Charlize Theron: Juice Arrival at Equinox Gym!

Charlize Theron holds onto a juice bottle while arriving at Equinox Gym on Tuesday (February 19) in West Hollywood, Calif.

Over the weekend, the 37-year-old actress was seen showing some love for her precious son Jackson while doing some shopping with her mother Gerda in Beverly Hills.

PHOTOS: Check out the latest pics of Charlize Theron

On the same weekend, Charlize invited her gal pals Sandra Bullock and Chelsea Handler for Jackson‘s birthday celebration.

“Sandra Bullock was one of the first guests to arrive with her son Louis,” an eyewitness told E! News. “As they walked into the party, they bumped into Chelsea Handler who had also just arrived in a limousine. They all walked in together and headed for the backyard where children’s music was playing and kids were running around.”