Stars shared their extended Thanksgiving weekend activities on Twitter this week. Paris Hilton  had a bikini-filled vacation, while Gwen Stefani  spent quality time with her husband, Gavin Rossdale . Gisele Bundchen  dressed to impress for an event, and Nicole Richie  caught up with her sister, Sophia — click through to see all the pics, and don't forget to follow PopSugar on Twitter  for exciting news and photos!
Ready, Set, Go!
Gisele Bundchen got ready for an event  in Brazil.
Nicole Richie and her sister Sophia  took a picture together.
Mariah Carey played on her computer  and said hi to a friend.
Where's the Hair?
Kellan Lutz shaved his head  and showed off the results!
Miranda Kerr got ready for a TV appearance  on Chelsea Lately.
Paris Hilton hit the beach in a bikini  on a Hawaiian vacation.
Gwen Stefani and Gavin Rossdale  reunited after solo appearances.
All in the Family
Jessica Alba celebrated Thanksgiving  with her family and her new baby, Haven.
Rachel Zoe celebrated shoes with Brian Atwood .
Katy Perry snuggled with her cat , Kitty Purry.
Niki Taylor shared a picture of her newborn baby , Rex.
Rumer, Tallulah, and Scout Willis  went to Paris for Tallulah's Crillon Ball.
Plain White Tees
Bar Refaeli went to a race  with her friends Ana Paula Junqueira and Vale Micchetti.
Cat Deeley went to a pool  on her last day of vacation.
Cory Monteith met up with Canada's prime minister .