Copeland v. Bieber et al., No. 2:13-cv-00246 (E.D. Va. filed May 2, 2013).
Justin Beiber and Usher were sued by authors of the song "Somebody to Love" for alleged copyright infringement. The notable aspect of the Complaint is the level of detail the Plaintiffs include in alleging the extent of copying and comparing the two works (at paragraph 47).