upset artist

基本解释

Jazz bassist Esperanza Spalding upset boy wonder Justin Bieber for Best New Artist (according to pre-ceremony Vegas odds, Spalding was the longest shot to win).
FORBES: James Franco, Anne Hathaway, and the Convergence of Oscar and Grammy
Fun. took home major awards best new artist, in something of an upset over Frank Ocean, and song of the year for the transcendent anthem "We Are Young, " featuring Janelle Monae.
NPR: Grammy Awards Voters Spread The Love All Around