Charlie Robert Simpson (born 7 June 1985 in Woodbridge, Suffolk, England), was the youngest member of the highly successful pop group Busted, and is now the vocalist and guitarist in Fightstar.

Charlie attended public school Uppingham, along with the likes of Harry Judd from McFly and his ex-girlfriend Camilla Smith. He was selected as the third member of Busted, beating Tom Fletcher (now lead singer and guitarist in McFly), after responding to an advert placed by Matt and James in NME magazine in 2001. He plays guitar, piano, drums and bass, and sings vocals.

He is renowned for his distinguished eyebrows, which he says are "...the biggest and best in the business", and his guitar playing style. He loves Nirvana and The Deftones and considers Kurt Cobain his idol.

On 14 January 2005, Charlie caused Busted to split after deciding to leave the band to concentrate on his other band, Fightstar. The name "Fightstar" was created when bassist Dan Haigh came up with the name "Evenstar" and Charlie thought of the name "A Time To Fight", these names were combined to give the name Fightstar.

He met the other guys in the band through Camilla when Alex's sister moved in with her as a flatmate, and Fightstar was born. He has two other brothers who are also in bands, Brigade and Prego and both have supported Fightstar on recent tours/gigs.

Charlie has been the focus of mixed opinions from the media and Busted fans alike, ranging from hatred to high praise and respect.