This week, Aubrey O'Day channels her inner Britney Spears in this circus-inspired getup, Sam Smith celebrates his four Grammy nominations and Kelly Rowland shares a sweet photo cradling her newborn baby boy, Titan.

Also, Chloe Grace Moretz looks bored on the set of her new project, Miley Cyrus says she stole a stripper's shirt in her latest selfie and Kylie Jenner spends some quality time with her dad Bruce Jenner in Malibu.

Plus, Alessandra Ambrosio celebrates Christmas early while in London, Adrian Grenier looks hot while doing some charity for children and Taylor Swift gushes about her fellow Victoria's Secret Fashion Show performer Ariana Grande!

Click "Launch Gallery" above to see these stars personal pics and see even more celeb candids in this week's best celebrity TwitPics!