Bikinis, Birthdays, and More of the Week's Cute Celebrity Candids

This week, snap-happy stars shared their beach days, birthdays, and on-set moments through social media. Bar Refaeli posted cute bikini-clad snaps from her recent yacht day in Spain, while Kate Upton sported a white two-piece on the set of a swimsuit photo shoot. Tom Cruise's kids Connor and Isabella explored London by bike together, and James Franco struck a sexy pose while leaning on a car. Selena Gomez celebrated her 21st birthday by sipping mimosas with Ryan Seacrest, while his ex-girlfriend Julianne Hough spent her special day surrounded by family, friends, and pancakes. See their snaps, plus more from Beyoncé, Miley Cyrus, and Rachel Bilson!

Click through to see the rest of this week's cutest celebrity candids, and be sure to follow POPSUGAR on Instagram, Facebook, and Twitter!