He's already been spotted with Kim Kardashian on June 12, and Justin Bieber's Bahamas vacation just keeps getting hotter. At his concert at Atlantis Paradise Island on June 12, the fans went wild. "It's chaos," says an onlooker. "Girls everywhere!" And the young ladies weren't the only ones to catch Bieber fever — the pop star also charmed marine life when he went swimming at Dolphin Cay. Not only did he meet the resident sea lion, but he got to swim with his favorite dolphin, Elijah. "He's having a great time," says the onlooker.