Cheap$kate: FREE events in NYC this weekend

Backstreet Boys Concert
Backstreet's back, all right! Relive the nostalgia of your high school days as the Backstreet Boys take the stage in Central Park Friday morning to close out this year's "Good Morning America" Summer Concert Series. Just be prepared to squeal and shriek like a teenager - unless, of course, you are a teenager, in which case you're probably already prepared. (Friday, 7-9 a.m., FREE, Rumsey Playfield in Central Park, entrance at 72nd St. and Fifth Ave., gma.yahoo.com/good- morning-america-summer-concert- series-2012.html)

Movies

Syfy Movies with a View
The final movie of this film series in Brooklyn Bridge Park is elected by public vote, so we can't write any quippy, clever descriptions because we don't know what the movie showing Thursday will be. However, with the eclectic mix of "E.T.," "Clueless" and "Wet Hot American Summer" screening earlier this summer, we're confident it'll be a good one. So stop by and enjoy the end of summer with a final movie under the stars. (Thursday 6 p.m., FREE, Brooklyn Bridge Park, Pier 1, Harbor View Lawn, brooklynbridge park.org)