For 14 weeks in the year 2015, Bruno Mars and Mark Ronson's 'Uptown Funk' stayed on the Billboard's top spot making it the second-longest lasting song in the No. 1 hit single in the history of music records. Additionally, the single sold more than 6.1 million copies last June of the same year.

After earning millions from their chart-topping hit, Bruno and Mark might as well find themselves in court, per TMZ reports, because of a lawsuit filed by the only one surviving member of the band Collage from Minneapolis, Larry White, along with the estates of two deceased members accusing both singers to have copied their song from their 1983 single, Young Girls.

Collage claims that the hit-single copies the rhythm, harmony, melody and structure of their song, and that are reason enough to believe that Uptown Funk is derived from their song Young Girls. The text of the lawsuit was obtained by Pitchfork and it states:

Upon information and belief, many of the main instrumental attributes and themes of "Uptown Funk" are deliberately and clearly copied from "Young Girls," including, but not limited to, the distinct funky specifically noted and timed consistent guitar riffs present throughout the compositions, virtually if not identical bass notes and sequence, rhythm, structure, crescendo of horns and synthesizers rendering the compositions almost indistinguishable if played over each other and strikingly similar if played in consecutively.

Uptown Funk really brought Bruno's career into light since it's one of the most successful songs he's created so far. However, Collage isn't really the first band to accuse Bruno and Mark of copying their song.

With their 1979 hit, Oops Upside Your Head, The Gap Band's five writers, Robert, Ronnie and Charlie Wilson, keyboardist Rudolph Taylor and producer Lonnie Simmons claimed as well that Uptown Funk sounded too similar to their song.

Earlier this year, another group called The Sequence also claimed that Bruno and Mars infringed on their song 'Funk You Up'. However, the group did not bring a lawsuit.