Think back throughout the year: How many times did you use Shazam to identify a song? Are you one of the 11.7 million fans who used the app to discover Masked Wolf’s “Astronaut in the Ocean”? The Australian hip-hop artist’s sleeper hit may have first been released in 2019, but after going viral on TikTok, it received more Shazams than any other song in the world during 2021—by quite a margin, in fact. The Weeknd came in second, with 8.5 million Shazams for “Save Your Tears,” while Ed Sheeran’s “Bad Habits” received 8.1 million. Explore the 100 songs that received the most Shazams in 2021 with this playlist.