Last Lap: What Did Katy Perry Pray For When She Was A Child?
Ke$ha gives fans an update on her treatment, Selena Gomez feels she still has a ways to go, and Lorde's little sister may be planning her own pop career.
[mtvn_player content_uri="mgid:uma:video:mtv.com:944519" autoplay="true" width=615 height=345]