On Wednesday, Hagar, now 77, let his set list do the punching, opening the show with the debut of his newest song, "Encore, ...

Sammy Hagar's 'Best of All Worlds' Vegas residency kicked off with a guest appearance by Kesha, and featured the first "Love Walks In" since 1993.

The Red Rocker’s most extensive performance commitment ever on the Strip, “Best of All Worlds” runs through May 17.