Liam Hemsworth is about to hit the big time when The Hunger Games opens in theaters just past midnight on March 23. But the 22-year-old Australian star's girlfriend, Miley Cyrus, has been getting attention in L.A. clubs lately for all the wrong reasons.
PHOTOS: Miley's wildest moments so far
"She gets pretty crazy," a source tells Us Weekly of Cyrus, 19. "She's always out in skimpy outfits and writhing on Liam . . . Sometimes he looks embarrassed for her."
Another insider explains that while Hemsworth loves his girlfriend's "fun-loving side . . . he gets concerned too."
PHOTOS: Hunger Games sneak peek
Get more details on Cyrus' nutty club antics in this week's Hot Stuff video, as told by Us Weekly Senior Editor Ian Drew, plus special guest, rapper Waka Flocka Flame!
Also in the roundup: Heidi Klum and Sandra Bullock have a single moms' night out, Jennifer Aniston drops $20,000 on lighting for her new $21 million abode with Justin Theroux, and more.
PHOTOS: inside the star-studded Hunger Games premiere
Watch the Hot Stuff clip now!
For much more on Hunger Games, including 125 gorgeous photos and exclusive interviews, pick up Us Weekly's Hunger Games special -- available on newsstands now. Order it today!