The Season 1 "American Idol" winner shows off her serious singing chops. (Sat., 8 p.m., $39.50, Radio City Music Hall, 1260 Sixth Ave., at 50th St., 212-307-7171)
Freeze Tag on Wall Street
The Levys' Unique New York - a creative tour company - is hosting a nostalgic afternoon of play. Freeze tag is the main attraction, but other schoolyard games - Red Rover! - will also be in session. (Sat., noon, FREE, corner of Wall and Broad sts., levysuniqueny.com)
'Sunday at the Ballet With George'
To celebrate the birthday of its co-founder George Balanchine, the New York City Ballet is hosting a day of performance and free talks. (Sun., 1:45 p.m., $29-$149 for performance, other events FREE, David H. Koch Theater, 20 Lincoln Center, at W. 63rd St., 212-870-5570)
'Portlandia: The Tour'
Funny folk Fred Armisen and Carrie Brownstein bring their IFC sketch-comedy show to the stage. (Fri., 9 p.m., $30, Music Hall of Williamsburg, 66 N. Sixth St., at Wythe Ave., Williamsburg, 718-486-5400; Sat., 9 p.m., $30, Bowery Ballroom, 6 Delancey St., at Bowery, 212-533-2111)
The jam band hits up Times Square in support of its new album, "Death by Stereo." (Fri., 8 p.m., $25, Best Buy Theater, 1515 Broadway, at W. 44th St., 212-930-1950)