Sammy Hagar made a surprise appearance Wednesday night at his Cabo Wabo Cantina in Cabo San Lucas, Mexico ahead of his annual Birthday Bash shows there this weekend. He did a seven-song set with the house band with Alice in Chains guitarist Jerry Cantrell joining him for Alice’s “Man in the Box,” Montrose’s “Rock Candy,” and Lynyrd Skynyrd’s “Simple Man.” Hagar does his two Birthday Bash shows on tonight and the other Sunday, his 77th birthday.