NEW YORK — After months of rumors and hint-dropping, pop icon Britney Spears revealed what she called her “(not-so-)secret” news — she's heading to Las Vegas. The 31-year-old pop star confirmed a two-year residency at Planet Hollywood Resort & Casino on ABC's “Good Morning America.” “Britney: Piece of Me” will debut Dec. 27, just in time for Las Vegas' massive New Year's crowds. Spears announced 16 dates, but she will perform 50 shows each in 2014 and 2015. Spears was flown to a dry lake bed in the Nevada desert for the pre-dawn announcement. About 1,300 people had been bused to the remote location in the wee hours of the morning, and were waiting for her dressed in Britney Spears T-shirts or the singer's signature schoolgirl look from her.”.. Baby One More Time” music video. The Grammy-winning singer's confirmation about the residency comes after much online speculation, including some of her own Vegas-themed tweets. She said in an interview on “GMA” that the show will feature her greatest hits as well as new material.— AP