Steven Tyler: Rock-a-Bye Baby

9/25/2007 1:17 PM PDT BY TMZ STAFF
Aersomith frontthing Steven Tyler simultaneously serenaded his daughter Liv -- and frightened grandson Milo -- during a concert in Toronto. Grandpa looks like a lady!

While Milo wore pink headphones to shield him from the 59-year-old alta cocker rocker, Mama Liv endured the performance earplug-free! Livin' on the edge!