Calvin Harris Runs Errands Sans Taylor Swift in Santa Monica

Calvin Harris keeps it low-key while stopping by the pharmacy for a few things on Monday afternoon (October 5) in Santa Monica, Calif.

The 31-year-old DJ kept it comfortable in a t-shirt and gym shorts.

PHOTOS: Check out the latest pics of Calvin Harris

It was recently revealed that Calvin is part of the star-studded line-up for 2015 iHeartRadio Jingle Ball!

The tour will be making stops all over the country including New York City, Los Angeles, Boston, Miami, and Chicago!

10+ pictures inside of Calvin Harris running errands in Santa Monica…