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Singer Justin Bieber, right, talks with actor Mark Wahlberg as he watches the Los Angeles Clippers play the Oklahoma City Thunder in the second half of Game 4 of the Western Conference semifinal NBA basketball playoff series, Sunday, May 11, 2014, in Los Angeles. (AP Photo/Mark J. Terrill)

Justin Bieber the sports fanatic

Justin Bieber was spotted at the Pittsburgh Steelers' Bible study on Saturday night. The international star is a big sports fan.