"... no idea she could sing" ?
She's won a Tony award as Best Actress in a Musical! Here's a bit of a bio:
Seeing her in FoTC was a great reminder of the truly talented people Bret and Jemaine can draw into their projects. On the one hand, I wish they'd given her more to do; on the other, it was a bit of a laugh to see this well-known singing, dancing dynamo play such a quiet character.