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    Ariana Grande surprised American Idol viewers and contestant Sam Woolf with a small appearance tonight. Check it out.

  • WATCH: Alex Preston & Sam Woolf Duet – ‘The Girl Is Mine’

  • WATCH: Sam Woolf Sings ‘Lego House’ on ‘American Idol’ Top 8

  • Sam Woolf, ‘American Idol’ Finalist: 5 Fast Facts You Need to Know

  • WATCH: Sam Woolf’s Amazing American Idol Audition