Britney Spears: Summer of Hope Supporter!

Britney Spears goes sleeveless while stocking up on groceries with her boyfriend David Lucado at CVS on Friday (June 21) in Westlake Village, Calif.

“Join me & @cityofhope in the fight against terminal diseases this summer. #BritneyArmy – Let’s do this! #summerofhope,” the 31-year-old entertainer tweeted earlier in the day.

PHOTOS: Check out the latest pics of Britney Spears

The Summer of Hope campaign helps raise funds for cancer, diabetes, and HIV/AIDS research.

The day before, Britney donned a cute little blue dress while stepping out of her car in L.A.

FYI: Britney is wearing Sunday Somewhere “Chely” sunglasses.

25+ pictures inside of Britney Spears and David Lucado dropping by CVS…