Ashlee Simpson & Evan Ross Beach It Up with His Mom Diana Ross!

Ashlee Simpson keeps it chic with some black heels while walking to her office on Friday (March 28) in Beverly Hills, Calif.

Earlier in the week, the 29-year-old entertainer and her fiance Evan Ross were spotted spending some time at the beach with his mom and legendary singer Diana Ross.

PHOTOS: Check out the latest pics of Ashlee Simpson

In case you missed it, Ashlee and Evan recently celebrated their love with a private engagement party.

25+ pictures inside of Ashlee Simpson and Evan Ross spending time with his mom Diana Ross…