Sam Asghari is looking better than ever in his single era! The hunky actor, 30, took to Instagram on Thursday, May 2, to share a snap of himself showing off his toned physique on a hike with his dog after he finalized his divorce from ex-wife Britney Spears. “Life update. 😁,” Asghari captioned the photo of himself shirtless while enjoying the great outdoors with his pup. The sultry post came the same day that his former spouse, 42, made headlines after authorities responded to an alleged fight between Spears and her new boyfriend, Paul Richard Soliz, at the Chateau Marmont on Wednesday, May 1….