In 1997, Harvey was sacked from East 17 after making comments in a radio interview that appeared to condone the use of the drug ecstasy, causing an uproar in the press and the matter being raised in Parliament. Mortimer left East 17 several months later. Harvey eventually rejoined the group under the rebranded name of E-17.

In 2000, Harvey collaborated with True Steppers with the song “True Step Tonight” featuring Donell Jones, that reached No. 26 in the UK.

After E-17, he signed a record deal with Edel Records and had two singles released in 2001, “Straight Up (No Bends)” (No. 26 UK) and “Loving You (Ole Ole Ole)” (No. 20 UK).

On 12 December 2001, he required reconstructive surgery after being attacked with a knife in a club car park in Nottingham. In May 2005, after being diagnosed with clinical depression, Harvey was hospitalised after an alleged suicide attempt. On 31 May 2005, he was re-admitted to hospital in a critical condition after falling under the wheels of his car.

In 2004, Harvey appeared in the fourth series of “I’m A Celebrity…Get Me Out Of Here!”. Harvey walked out of the jungle after six days, before being voted off by the public.

On 17 March 2007, Harvey performed a song entitled “I Can” for Making Your Mind Up, the UK’s national final for the Eurovision Song Contest. The song was written by singer Conner Reeves. Harvey was eliminated after the first round of voting and the eventual winners were Scooch.

In 2019, Harvey was making music with rapper Cryptik Soul. He was featured in the songs “A Ghetto Luv Story” and “Bang ‘Em Up” on Cryptik Soul’s album Killer’s Blood. The album was supported by the singles “Come & Save Me” and “Bang ‘Em Up”.