List1 of 13
1. Miley celebrated baby sister Noah.
Noah, the youngest of the Cyrus brood, turned 21 on Jan. 8, and Miley celebrated her with adorable throwback photos (we see that flower barrette!) and some sound advice: "Don't get near as drunk as I did." Miley also wrote how her sister was "such a rockstar" in helping her mourn the loss of her dog, Mary Jane, recently, which tells us a lot about the sisters' bond.