The 31-year-old singer, who just broke up with her fiance Jason Trawick, is said to have voluntarily handed back the huge 3.5-carat ring, designed by Neil Lane to Trawick, the Daily Mail reported.
The mother-of-two teamed her new ring with a simple yet flattering outfit of a white blouse and dark jeans, and was wearing her blonde hair tied halfback.
Spears, who was accompanied by a burly bodyguard, shielded her eyes in tinted sunglasses and wore the slightest hint of make-up including neutral lip-gloss.
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