Jordan and Jonathan Knight, Joey McIntyre, Donnie Wahlberg and Danny Wood hit the stage at the MGM Grand Garden Arena amid their Las Vegas residency.
The Queen Latifah-hosted, fan-voted show featured performances from lifetime achievement award recipient Billy Idol, Pussycat Dolls and Busta Rhymes, KATSEYE and New Kids on the Block.
The '80s rock icon performed "Eyes Without a Face" and "Dancing With Myself."
"We should be striving to live, to become a community and become a country that we deserve what they sacrificed," the Hootie and the Blowfish frontman said, reflecting on his meaningful interactions with those who've served.
The six-member outfit, currently performing as five while member Manon is on hiatus, committed to a tea party and teddy bears theme at the Las Vegas ceremony.
The group's three original members Ashley Roberts, Nicole Scherzinger and Kimberly Wyatt were joined by Busta Rhymes at the Vegas ceremony.
The seven-member group kicked off the Las Vegas event with a pre-taped performance of "Hooligan" from their concert the night before.
Host Queen Latifah, Nikki Glaser, KATSEYE, New Kids on the Block, 'Hacks' stars Meg Stalter and Paul W. Downs and Busta Rhymes were also spotted on the blue carpet at the MGM Grand.
The rapper-actress brought "U.N.I.T.Y" to the Las Vegas-set music ceremony.
The group is slated to make a special appearance at tonight’s American Music Awards before picking the tour back up later in the week with two more shows at Allegiant Stadium.