Big Sean on Dinners With Kim and Kanye, Dirty Raps With Ariana Grande

Big Sean is having some phone trouble. “Outro,” from his chart-topping third album, Dark Sky Paradise, ends with a challenge to anyone who says fame has changed him: “Say I’m hard to get in contact, oh, is that true?/But what about now? 313-515-8772.” That’s no empty rhyme – the number…