Adele's return was the pop happening of 2015, but compared to many other acts who reemerged this year, the three-year gap between 2012's "Skyfall" and the seismic impact of "Hello" was a mere blip. The year has been rife with sudden comebacks by bands or solo stars who had been absent from the popular consciousness for much longer stretches. Perhaps most surprising was that the returns were frequently strong — not just attempts to cash in on pass successes, but pushes to match previous highs.

The wave started in 2014, first with Garth Brooks, who reappeared after 13 years, and then with D'Angelo, who hadn't put out an album since 2000. This year, the pace increased as a stream of big-name acts reemerged in a variety of genres, including rock (Sleater-Kinney, Blur), hip-hop (Dr. Dre), and dance music (Chic, Giorgio Moroder). The trend shows no signs of stopping, either — Phil Collins was the latest to announce that he's giving music another go. Here's who we welcomed back in 2015.