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[Analysis] Billie Eilish – Bad Guy by PianoX

Billie Eilish and her hit song Bad Guy took over the world in 2019, dominating music charts and garnering widespread critical acclaim. The song, which was written and produced by Billie and her brother Finneas O'Connell, features a catchy melody, unique instrumentation, and a memorable chorus that quickly caught the attention of music fans worldwide. Check out a piano cover of this massively hit song, definitely worth checking!

Breaking Records and Making History: Billie Eilish's Grammy Wins

Billie Eilish is an American singer and songwriter who rose to prominence in 2015 with her debut single 'Ocean Eyes'. She was born on December 18, 2001, in Los Angeles, California, and grew up in a family of musicians.

Green hair girl holding an award Grammy Billie Eilish  MyMusicSheet
Billie Eilish

Eilish's music style is characterized by her soft and haunting voice, introspective lyrics, and minimalistic production. Her music covers a range of genres, including pop, alternative, and electronica. Some of her most popular songs include 'Bad Guy', 'When The Party's Over', 'Bury a Friend', and 'Therefore I Am'.

In addition to her music career, Eilish is known for her distinctive fashion sense, which often involves oversized clothing and unique hair colours. She has also been open about her struggles with mental health and has used her platform to advocate for mental health awareness.

Eilish has won several awards for her music, including multiple Grammys (as of April 2023 she has seven Grammys) and Brit Awards.

Image Credits: DW

Why Billie Eilish's 'Bad Guy' Became a Viral Sensation

'Bad Guy' is a song by Billie Eilish that was released in 2019 as the fifth single from her debut studio album, "When We All Fall Asleep, Where Do We Go?". The song was co-written by Eilish and her brother Finneas, who also produced the track. Bad Guy features a bass-heavy beat and a playful, sarcastic tone in Eilish's vocals. The lyrics of the song revolve around the concept of being a bad guy and embracing a rebellious and edgy persona, challenging the traditional notions of what is considered to be "good" or "bad."The song has been critically acclaimed for its unique sound and lyrics, and it quickly became a commercial success, topping the charts in several countries, including the United States and the United Kingdom. The music video for Bad Guy also garnered attention for its surreal visuals and quirky choreography. Bad Guy has been covered and remixed by numerous artists and has become a popular cultural reference in memes and internet culture. It has also won several awards, including the MTV Video Music Award for Best Song of the Year and the 62nd annual Grammy Award for Record of the Year.

The Offical music video for the song Bad Guy


Bad Guy


White bed, Pillow, Blanket and a girl in white sitting on the bed with black background MyMusicSheet
Bad Guy Poster

- Artist: Billie Eilish

- Released: March 29, 2019


- Label: Darkroom/ Interscope Records

- Producers: Billie Eilish, Finneas O'Connell

- Composers: Billie Eilish, Finneas O'Connell

- Genre: Pop

- Key: G Major

- Length: 3'14"


Join the PianoX Community: Almost a Million Subscribers Can't Be Wrong!

PianoX is a popular YouTube channel that provides piano tutorials, covers, and arrangements for various popular songs. The channel is run by a talented pianist and musician who goes by the name of PianoX. PianoX's content is focused on providing high-quality piano tutorials and covers that are accessible to beginners and advanced players alike. They do famous compilations, covers and soundtracks.

A while cross or X in the background of blue PianoX MyMusicSheet
PianoX YouTube Profile

PianoX joined YouTube on March 18th 2010, PianoX's channel has gained a large following on YouTube, with almost a million subscribers and 175 million views of their videos. Their tutorials and covers are praised for their high quality, attention to detail, and engaging presentation style. PianoX’s most popular video is a tutorial called ‘XXXRWNTACION-SAD! | Piano tutorial’ posted on June 21st 2018, where along with falling keys style on the video and these keys have the notes name that is being played. PianoX has many tutorials that help beginner piano players, so if you are new to piano or sheet music, check their video and learn to read sheet music basics from MyMusicSheet from here.

PinaoX's Bad Guy cover along with Billie Eilish's songs

Experience the Magic of Billie Eilish's Bad Guy with PianoX's Piano Cover

Bad Guy took the world in 2019 and is still one of the most popular songs in the history of music. Hence, many people have made covers, renditions, songs and lyric covers. PianoX had made the cover of the top 5 songs of Billie Eilish’s songs and their piano tutorial. One of the songs that is played is Bad Guy.

The song starts at 3:59 seconds on the video. The original song is in G Major but PianoX plays the song in Bb Major key signature. The time signature of the song is 4/4 and the tempo of the original song is about 135 BPM.

Verse 1

The original song starts with the beats that are played throughout the verse. The first time starts without the lyrics and then there are two polarographs in the first verse, the second paragraph then has the additional beats to add a new layer to the song.

PianoX starts by playing the song similarly. There are chords that are played in the beats. Starting from the bit left side of the piano and then in between a section there is one key that is played. Then the left-hand stays there where the right hand come towards the a but if the middle of the piano. Then the final second paragraph of the verse is played, then slowly the left hand also comes towards the right and then verse 1 ends when there is a long key played by the left hand and the chorus starts.


The chorus is the most fun part of the song. This is a peppy part of the song because the beats and lyrics are catchy and easy to remember. This section has 8 times played for each line.

The chorus in PianoX starts at four minutes and twenty-seven seconds. The first four times are repeated. It is played on the left side of the piano as well. You can hear and sing the lyrics with these beats; that much how popular the song is. Then there is a short pause and then the next four are played. These are a bit faster than the rest and there are many keys that are being played. This song has a chord and is repeated many times, and then a new chord. It is a very good song from PianoX that you can learn and practice your piano with even for beginners and intermediate piano players.

Post- Chorus

Then comes the post–chorus at four minutes and forty-one seconds which is the final eighth of the chorus which in the lyrics is the ‘I’m the bad guy, Duh’ and then followed by the faster beats.

Here PianoX plays it slowly and softly from the right hand, the long presses a single key. This is where the lyrics ‘I’m the bad guy. Before the fast part, there is a small key that is pressed very quickly and gently and it is very hidden yet visible ‘Duh’ anyone has covered through their song. This is again the fast part with many keys played. This is the highlight of PianoX’s this bad guy cover. In the initial part of the second half of the post-chorus, PianoX played it in the centre again repeated four times. And then right-hand moves slightly towards the right side of the piano and the left-hand does move slightly towards the left. Then PianoX again repeats the beats three times and the final fourth PianoX ends with a small outro to the song.

There is still Verse 2, Chorus, post-chorus, Bridge and an Outro left to the original song, but as this was a compilation of all the top 5 songs of Billie Eilish's so PianoX had cut it short with the other parts and played the first half of the song. The atmosphere and feel created by PianoX was very similar to the original song and it is still a fun song to play.

Billie's unique style and persona have also contributed to the success of Bad Guy and her rise to stardom. Her music is known for its dark and moody sound, often featuring haunting vocals and introspective lyrics that explore themes of mental health, relationships, and self-acceptance. This authenticity and vulnerability have resonated with audiences, particularly younger listeners, who have hailed Billie as a relatable and empowering role model. As a result, Bad Guy quickly became a cultural phenomenon, with the music video amassing over a billion views on YouTube and the song topping charts around the world. PianoX did an amazing piano playing and people who are interested in Billie's songs just grab a sheet music and start playing the song and enjoy.

If you love this arrangement, you can check the arrangement here. There are other PianoX arrangements which are definitely worth checking out.

If you like this song or any other song, there are many more sheet music you can find on MyMusicSheet or

Until next time, Happy Music!


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