Katharine Whalen most notably of the Squirrel Nut Zippers.
Ingrid Michaelson
Stephanie from Lazy Town
Mark Wills
Westlife, Adam Sandler.
Motorhead
He sings... Six* by the way. According to various sources, he sings, plays bass, guitar and keyboard.
Zooey Dechannel
Stephanie from Lazy Town
It sounds an aweful lot like Ingrid Michaelson, but I'm not totally sure if its her that sings "Play, Laugh, Grow" for Fisher Price.
"play, laugh, grow"
Play. Laugh. Grow
no she does not
Childrens toys made by Fisher Price
yes she does I googled her
Mark Wills
Adam Sandler - Grow Old With You
The Pussy cat dolls
Grow a pear