/ Source: Us Weekly
Britney's back in a bikini.
The singer (and mother of two), 28, showed off a toned bod Tuesday while vacationing with beau Jason Trawick in Hawaii.
Photo gallery: Britney's bikini through the years
Spears — who recently taped an episode of Fox's "Glee" — can now be seen as a Japanese bride on the September cover of Pop magazine.
"I just saw the photos for the first time and they are beautiful," Spears Twittered.
Photo gallery: Britney and her boys
In the magazine, she says shes open to working with Lady Gaga.
"I'm a big fan of hers," she says. "Anything's possible!"