Music fans win at the Topsfield Fair

It’s been a big week for music fans at the Topsfield Fair. On Thursday, lucky fans Megan Grenier, Meghan Tansey, and Riley Thomson got to meet performer Sean Kingston, who’s back on the road after recovering from a serious jet ski accident that occurred in May. Kingston, best known for the single “Beautiful Girls,’’ was psyched to have so many local groupies. He tweeted this message in all caps: “Love my Boston fans!!! . . . The hotel manager just called my room and said [there] are like 40 screaming fans in the lobby waiting on me!’’ Two days later, it was Zach Porter, of the California group Allstar Weekend, who was surrounded by admirers. Allstar Weekend got famous on the Disney Channel. Today is the last day of the Topsfield Fair.