This comes a week after Thicke filed a countersuit to Marvin Gaye's family over their claim that "Blurred Lines" isn't really his song and that Gaye's "Got To Give It Up" feels and sounds the same.

In an interview with Radio.com earlier this year, Thicke admitted when he went into the studio with Pharrell last summer to record "Blurred Lines" that he wanted to create a song that embodied the fun vibe of his favorite song of all time, Gaye's 1977 hit "Got To Give It Up." An hour later, the duo came up with "Blurred Lines," the song that would become Thicke's first No. 1 on the Billboard Hot 100 chart.

As surprised as he was that the track went to No. 1, he surely didn't expect to be sued by Gaye's family. After the Gayes and Bridgeport Music, which owns some of Funkadelic's compositions and are also filing suit for musical similarities, Thicke and collaborators Pharrell and T.I. filed their own suit against Gaye's family and Bridgeport Music.

Thicke's reasoning for the suit, the court documents note, is defensive: "Plaintiffs, who have the utmost respect for and admiration of Marvin Gaye, Funkadelic and their musical legacies, reluctantly file this action in the face of multiple adverse claims from alleged successors in interest to those artists. Defendants continue to insist that plaintiffs' massively successful composition, 'Blurred Lines,' copies 'their' compositions." - more on this story

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