Attack of the '90s!

Hot Mamaguchi! The New Kids! Sweet Valley High! See how the biggest hits from the last decade are making a comeback. By Cara Lynn Shultz

NEW KIDS ON THE BLOCK

Then: They were arguably the biggest group, with a No. 1 single ("Step by Step"); a No. 1, triple-platinum disc (also called Step by Step); a Saturday morning cartoon show, Magic Summer; an extravagant tour; and a pay-per-view special that broke records.

Now: It's time for more of the right stuff. Danny Wood, Jordan Knight, Joe McIntyre, Donnie Wahlberg and Jonathan Knight have reunited for screaming girls everywhere. Up next: A new album and tour. They're still hangin' tough!