Taylor Swift, John Mayer & Katy Perry at Drake’s 30th Bday
Drake celebrated his BIG 3-0 Sunday night with a stacked guest list who put their differences aside, namely exes Taylor Swift and John Mayer, as well as Katy Perry. Taylor rolled into Delilah in WeHo flanked by squad members Karlie Kloss and theHaim sisters, but what’s interesting is that Mayer also showed up. Perry was…