Jen Aniston Celebrates Her 41st Birthday in Mexico – with Gerard Butler

She's certainly a creature of habit – and why change a good thing? Jennifer Aniston headed to one of her favorite getaway spots, Los Cabos, Mexico, where the actress is getting a jump start celebrating her 41st birthday – Aniston's big day is actually Feb. 11 – with a group of friends. But this year, she had a surprise birthday guest: Gerard Butler, her costar in the upcoming comedy, The Bounty Hunter. Last month, the two were spotted laughing and spending a lot of time together at the Golden Globes. Aniston flew a large group of pals including Butler, Courteney Cox, her husband David Arquette and Sheryl Crow, whose birthday is also Feb. 11, to the One & Only Palmilla resort Thursday evening where the group is staying in a beautiful waterfront villa. Friday, there was one thing on the agenda: fun in the sun! Aniston showed off her famously fabulous figure in a bikini as the pals lounged on the patio. – Pernilla Cedenheim and Jennifer Garcia