Plot: Multiplatinum superstar Justin Bieber joins Oprah for the first-ever global episode of Oprah's Next Chapter, airing in more than 100 countries worldwide! She goes behind the scenes of Justin's sold-out concert at Chicago's Allstate Arena. Plus, Oprah helps surprise one lucky girl—chosen from among thousands of "Beliebers"—to go onstage for Justin's signature "One Less Lonely Girl" performance