The 33-year-old singer - who is expecting her first baby with One Direction singer Liam Payne - sent her PA Lily England to the Maldives so she could celebrate the milestone.
Lily wrote on Instagram: "What an unbelievable trip... somewhere I'd only ever dreamed of visiting! Thank you @cherylofficial #bestbirthdaypresentEVER #turning30defintelyhaditsperks (sic)."
Cheryl is a fan of the Maldives and last February, just months after they started dating, she and Liam enjoyed a romantic break together in the Indian Ocean destination.