Britney Spears: will.i.am Birthday Wishes!

Britney Spears keeps it casual comfy while exiting a home with her new rumored boyfriend David Lucado on Saturday (March 16) in Agoura Hills, Calif.

“Happy birthday to my boy @iamwill…everybody #ScreamAndShout some bday wishes at him :),” the 31-year-old entertainer tweeted earlier in the day. will.i.am turned 38 years old yesterday.

PHOTOS: Check out the latest pics of Britney Spears

The day before, Britney was spotted enjoying a date with David at a golfing range in Thousand Oaks.

15+ pictures inside of Britney Spears stepping out of a home with David Lucado…