Bestie Yungen Feat. Yxng Bane Download 'Bestie' on iTunes
Watch a mini version of Britney perform Up N' Down'.
Britney Spears shared this super cute video on YouTube of her sister Jamie-Lynn's little girl doing a Brit.
"OMG! Check out my niece Maddie covering Aunt Britney's Up N Down," Britney posted.Brit's version of the 'Femme Fatale' album track has not been released as a single, with the next rumoured release said to be 'Inside Out'.