Sandra Bullock helped to whip up some sweet treats in the kitchen with Jennifer Aniston and Sean Hayes, with the alum sharing a cute video on Bullock's birthday. «Happy Birthday Sand-a-La!!» Aniston wrote on her Instagram Story on Wednesday, revealing her cute nickname for the actress. She also shared a pic of Bullock sipping from a campy mug that features a caricature of Aniston's Alex Levy character, offering a thumbs up as she drinks.Aniston followed up with a group shot that also included Courteney Cox, writing «WE LOVE YOU!!!» and «SO MUCH!» In the baking video, Bullock appears to take the lead as she and Hayes follow a printed recipe for pumpkin brownies.