But he didn't stop there. After the Backstreet Boys, Dasha made a surprise appearance to sing her viral hit, "Austin," and then the Goo Goo Dolls came out for two songs, "Slide" and "Iris." ...

But he didn't stop there. After the Backstreet Boys, Dasha made a surprise appearance to sing her viral hit, "Austin," and then the Goo Goo Dolls came out for two songs, "Slide" and "Iris." The guest ...