In 1968, Bell sang background and duet vocals on a number of Serge Gainsbourg songs, including "Comic Strip", "Ford Mustang" and "Bloody Jack".

[3] Bell then joined contemporary pop combo Blue Mink, with whom she had a number of Top 20 hits with Philips Records in the UK,[1] including "Melting Pot", "Our World", "Randy", "Banner Man", "Good Morning Freedom", "Sunday", "By the Devil I Was Tempted" and "Stay with Me".

[4] Before joining Blue Mink in late 1969 she sang solo, and her cover version of "Picture Me Gone" is still a Northern Soul favourite today, as is "What Am I Supposed to Do", from 1968, a two-minute B-side tune co-written with future Led Zeppelin member John Paul Jones, then working as one of London's most in-demand session bassists.

She also sang backup for the Dave Clark Five's single release, "Everybody Get Together", and contributed backing vocals to Elton John's 1972 album, Honky Chateau.

[7] Bell has also provided backing vocals on a number of other artists' recordings, notably Tom Parker's neo-classical arrangements,[1] and in 1975, performed with Sunny and Sue (originally members of Brotherhood of Man) at the Eurovision Song Contest in Stockholm, Sweden, providing backing vocals for the German entry "Ein Lied kann eine Brücke sein", performed by Joy Fleming.

That same year she did backing vocals on Yes drummer Alan White's only solo album Ramshackled, with other chorists Vicki Brown and Joanne Williams.