E.J. Johnson Celebrates His Birthday After 100-Plus-Pound Weight Loss

— -- E.J. Johnson loves to live lavishly, and his 23rd birthday party was no exception.

Last evening, Johnson, the son of NBA legend Magic Johnson who appears on the reality show "Rich Kids of Beverly Hills," shared a photo from the celebration, which took place at the Ivy near Beverly Hills.

"Bow down before the birthday queen! #june4th #gemini #teamthis," he wrote.

He certainly earned his cake: Two days ago, he posted a photo from a hot Pilates class. That healthy lifestyle is now second nature to Johnson, who underwent gastric bypass surgery last fall and has lost more than 100 pounds.

"I think that it was something that really helped me jump-start the life I definitely wanted to lead," he told Wendy Williams about the surgery. "I wanted to be the best me I can be, and that's always something I wanted to do. It's something that I struggled with and I needed that push in the right direction. And now, my mindset is completely changed."