Selena Gomez paid tribute to Britney Spears during her summer 2011 tour, but for some odd reason, I'm just now seeing this vid for the first time. I love it! Justin Bieber's cute little girlfriend performed a medley of Britney hits including "...Baby One More Time," Oops!...I Did It Again," "(You Drive Me) Crazy," "I'm a Slave 4 U," "Toxic" and "Hold It Against Me." Check it out below — it's super adorbs! I especially love Selena's "Slave" bit. xx