This week, Avril Lavigne gets back in the studio amid her battle with Lyme disease, Sam Smith looks seriously tired after his travels and Kylie Jenner shows off her teeny tiny waist! 

And, Cindy Crawford flaunts her flawless makeup-free face, Kaley Cuoco spends some time with her precious horse after splitting from Ryan Sweeting and Kelly Osbourne lends her vocals to a new Disney project. 

Plus, Zelda Williams gets a mini-makeover, the ladies of "Total Divas" take over London and Sharon Stone shows off her HOT bikini bod! 

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