world topmost musician that sing alone

Fergie Black Eyed Peas are technically still together, but their Fergalicious frontwoman has had major success as a solo artist too.

RICKY MARTIN
  the baby-faced pop star got his start as a member of the Puerto Rican boy band Menudo when he was 12.

This goes way back, but the "Raise Your Glass" artist used to be the lead singer for the band Choice before they split up in the late '90s.

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