Charles Robert Simpson is an English singer, songwriter, and musician from Suffolk. He is a member of the BRIT Award winning pop-punk band Busted and he is also lead vocalist and rhythm guitarist in the post-hardcore band Fightstar. AllMusic has noted that Simpson is "perhaps the only pop star to make the convincing transition from fresh-faced boy bander to authentic hard rock frontman". Simpson is a multi-instrumentalist, playing guitar, bass, keyboard, piano and drums.

Busted are an English pop-punk band from Southend-on-Sea, Essex, consisting of James Bourne, Matt Willis and Charlie Simpson. Formed in 2000, the band has had four UK number-one singles, won two Brit Awards, released four studio albums and sold over 5 million records worldwide. The band released the albums Busted in 2002 and A Present for Everyone in 2003 before disbanding in January 2005.