All week, New York welcomed Lady Gaga back home with appearances on everything from “106 & Park” to “The View.” Yesterday at 8 a.m., the Grammy-award winning Pop icon jumpstarted the day and “Good Morning America’s” Summer Concert Series by zip lining onto Central Park’s stage—a move fans didn’t see coming. While she made her entrance to “Bad Romance” in a white Arabian-inspired getup, she quickly stripped down to a red latex one-piece.

With the release of her much anticipated album Born This Way, which has already sold 800,000 copies since it’s Tuesday, May 23^rd release, thousands of Little Monsters supported in true fan fashion by lining up as early as Wednesday morning. The website shows highlights of the live performance, which they call “the biggest ever for a GMA Summer Concert Series event.”

Not too far from the Park, Rihanna helped “Today” their summer concert series, rocking at Rockefeller Plaza. Sporting a 50s-inspired hairstyle, the “S&M” singer strutted down the plaza’s street onto stage, in a blue and black two-piece, trench and fingerless gloves.

Exciting fans in bad girl RiRi style, tweets about her performance trended to the #2 spot on Twitter worldwide, according to today.com. Post-performance, on the show’s “Backstage Pass,” the Baijian beauty dished about her interest in psychology saying, “I really enjoying observing, reading and analyzing situations for what they really are” and her desire to collaborate with Depeche Mode. Who knew?

(Photos from left: Mike Coppola/Getty Images, Andrew H. Walker/Getty Images)