This week on Instagram Joe Jonas revealed the exciting news that Karmin will be joining the Jonas Brothers Live tour! We also saw an amazing 80's #ThrowbackThursday picture from Cougar Town's Busy Philipps and a sweet shot of Snooki and her son Lorenzo. See five of our favorite snaps from this week in the Best Celeb Instagram Pics of the Week below.

News: Hot New Hair: Jessica Alba's Bangs!

Photos: Mary-Kate & Ashley Olsen: A Love Affair With Outerwear

Watch: 'Cupcake Wars' Winner Hollis Wilder on Her New Book, Baking With Cupcake Tins, and More!

Who had your favorite celebrity Instagram this week? Let us know @OKMagazine and in the comments below!