Carly Rae Jepsen’s “Call Me Maybe” single, which tops the Hot 100, this week moved 296,000 downloads, according to SoundScan, while another version by an artist listed as “Here’s My Number So” sold more than 27,000 downloads of an identically named song in the same week. Both songs are listed at $1.29 on iTunes.

For the most part, these covers try to sound exactly like the hit single they’re reworking, and the more successful ones use search engine optimization-friendly artist names and song titles to lure unsuspecting consumers looking for the original version into making a song purchase.