Best Celebrity Instagram Pictures February 2013

Social-media-savvy celebrities kept the fun candids coming all month long, and we've rounded up the best of February. Julianne Hough goofed off backstage at Chelsea Lately, while Ian Somerhalder put on a yellow hard hat to go green. Joel Madden partied with Nicole Richie after the Oscars, Jessica Simpson shared a sweet photo of Maxwell, and Alicia Keys showed off her rock-hard abs. Kate Upton also stopped by NBC, while Sophia Bush rocked out at a concert, and even more stars shared their February fun.

Click through to see all of this month's snap-happy celebs, and be sure to follow PopSugar on Instagram, Facebook, and Twitter!