James Watkins / WENN 1 / 6
James Watkins / WENN 1 / 6

Is Ed Sheeran a musical thief? Two songwriters would have you believe that after claiming that the famous singer's song "Photograph" is a rip off.

Martin Harrington and Thomas Leonard filed a copyright lawsuit against Ed, saying that he heisted the tune from their song "Amazing," which they wrote for "X Factor" season 7 winner Matt Cardle.

The songwriters are seeking more than $20 million in damages.

For a well-known singer to be accused of stealing music is hardly a new thing. Below are five other artists who have been accused of jacking songs.

Justin Bieber - In late May, Casey Dienel, aka White Hinterland, says The Biebs stole a vocal loop for his monster hit "Sorry" from a song that she did two years ago called "Ring The Bell." In "Sorry," Justin only used 8 seconds of the similar sound (he opens the song with it), but Casey said he repeats it 6 times, making it essential to his song. She also claims that her song and his song feature keyboard synthesizers, samples, synth bass, drums, and percussion. The case is ongoing.

Robin Thicke - In 2013, Robin's "Blurred Lines" song was everywhere. Oddly, it was also everywhere in 1977, but it was called "Got to Give It Up" and it was by the late Marvin Gaye. In early 2015, Robin went to court after be was accused of jacking Marvin's song. A judge eventually agreed that Robin did hijack the tune and awarded Marvin's family $5.3 million in damages. Interestingly enough, the lawyer that the family used is the same lawyer being used by the men suing Ed Sheeran.

Coldplay - Legendary guitarist Joe Satriani sued Coldplay in 2009, saying the group plagiarized his 2004 song "If I Could Fly" in its Grammy-winning Song of the Year, "Viva La Vida." The lawsuit was eventually dismissed after a financial settlement was reached between the two parties. There are reports that say under the terms of the settlement, Coldplay doesn't have to admit to any wrongdoing.

Lady Gaga - Gaga was accused of song theft from a little known artist named Rebecca Francescatti. Rebecca claimed that Gaga's song "Judas" was remarkably similar to her song "Juda." A judge eventually sided with Gaga, though, saying there wasn't enough to convince him that the songs were incredibly similar, other than a few notes and the song titles.

Taylor Swift — Are three words really worth $42 million? An R&B singer named Jesse Braham alleged plagiarism when she sang "Haters Gonna Hate." he claimed that those words are remarkably similar to his lyrics "Haters gonna hate / players gonna play." This one is likely pie in the sky. Why? He demanded to be named a writer on her song, and asked for a selfie with her (not kidding). He's also suing CNN over the title of its show "New Day." Taylor is probably shaking this one off.