The 32-year-old's gold glittery sequin leotard popped open at the back Dec 28. Though she looked a bit distracted, she continued singing and dancing, while one of her backup dancers was trying to fix the mishap, reports aceshowbiz.com.
Spear's two-year Las Vegas residency started Dec 27 last with a number of fellow stars in attendance.
Singers Miley Cyrus, Katy Perry and Selena Gomez were spotted among the crowd with Spear's mother Lynne and sister Jamie Lynn Spears.
--IANS (Posted on 01-01-2014)