Rock & Roll Hall of Fame star Sammy Hagar lit up the stage at the Dolby Live Theater as he began his Park MGM residency. His “Best of All Worlds Stays in Vegas” residency was packed with 5,200- fans singing every lyric with their hands in the air as Hagar, original Van Halen bassist Michael Anthony, guitar virtuoso Joe Satriani and legendary drummer Kenny Aronoff tore through a set that was both a tribute to Van Halen’s unmatched legacy and a fiery reminder of Hagar’s own place in rock royalty. A continuation of their top-grossing “Best of All Worlds” summer…