Debbie Gibson!The Long Island-born singer took the radio waves by storm in the 1980s, breaking through with her debut album,, in 1987, and she didn't slow down from there.ET was there for many steps along the way, and in celebration of some major milestones — the singer was unveiled on the most recent season of and is celebrating the 35th anniversary of her first No. 1 singer, «Foolish Beat,» this year — Gibson sat down with ET to look back at some of her biggest career highlights.From a background part in to becoming the youngest artist to write, produce, and perform a Billboard number-one single, to touring around the world and starring on Broadway, Gibson's had plenty of major moments, and she was thrilled to take a walk down memory lane.«I mean, I'm a lucky and grateful girl,» she marveled.