Shell take the stage shortly before the ball-drop at midnight in New Yorks Times Square.
Rita Ora returns as co-host with Seacrest, who is marking his 20th year as host.
ET and streaming next day on Hulu.
The Jonas Brothers perform during the half time show of the 2024 Grey Cup at BC Place on November 17, 2024 in Vancouver, CanadaRich Lam/Getty Images
Underwood, who wonAmerican Idolin Season 4, returns as judge for the upcoming Season 25.
