'American Idol' aired tonight (Jan. 15), and one 'Idol' hopeful who stood out was guitar-playing 17-year-old Sam Woolf, who performed Ed Sheeran's 'Lego House.'

The teenager, who lives with his grandparents, quickly impressed the judges who were blown away by his talent and precision -- especially considering his age.

They were especially impressed with his sped-up version of the technically difficult 'Lego House,' which they never imagined could be performed that way.

Near tears by the end, Sam got a resounding "yes" from all three judges.

Watch Sam Woolf Play Ed Sheeran's 'Lego House' on 'American Idol'