Naturally, the Lord of the Rings star was thrilled with the surprise fete, posting a shot of him and his mom sharing a warm embrace. "Best gift ever surprise visit from me mum," Bloom wrote.
Celebrity attendees included Jennifer Aniston and her husband, Justin Theroux, with many of the guests donning cheeky jumpsuits splashed with the guest of honor's smiling face, as depicted in a fan photo on Instagram.
Earlier that evening, Perry rocked wire-rimmed glasses and a black jeweled shirt while debuting a new blonde 'do at her friend Sham Ibrahim's Palm Springs art show. Trying to match her beau who also recently dyed his raven locks, perhaps?