Article continues below advertisementBritney Spears suffered a wardrobe malfunction during her wild birthday trip to Cabo, Mexico.The singer, who turned 44 on December 2, has been drawing concern over her well-being in recent months, mainly due to her ex-husband Kevin Federline releasing a tell-all memoir.Article continues below advertisementSource: @britneyspears/InstagramThe pop star's assets was seen hanging out of her dress.The "Toxic" hitmaker wore a green floral dress and matching sandals in a video obtained by Daily Mail.