HOT GALLERY: Katy Perry Runs Around L.A.

Katy Perry was a busy bee running around in L.A. yesterday. The pop princess — who has been sticking to a strict workout routine — exercised with her trainer. Katy was also spotted leaving an L.A. recording studio.

Katy recently got engaged to comedian Russell Brand, and rumors continue to circulate that the couple is expecting a "Brand" new baby.

OK! HOT GALLERY: KATY PERRY PUMPS UP HER EXERCISE ROUTINE

Katy and Russell have not set a date yet, but wedding bells could be in the near future.

OK! NEWS: KATY PERRY LEARNED RUSSEL BRAND'S PROPOSAL PLAN ON GOOGLE