It’s no surprise that “Girls’’ star Lena Dunham was in town for the Boston Calling Music Festival. Her boyfriend, Jack Antonoff, plays guitar in the band Fun., which closed Saturday night’s festivities at City Hall Plaza. Dunham was spotted singing along to the band’s songs in front of the stage, bundled up in a hoodie. She was also spotted at South Station, which means she traveled here by train (or bus?) just like a regular person. Other VIPs at the festival included “Book of Mormon’’ and “South Park’’ creators Matt Stone and Trey Parker. . . . Boston Calling also earned Mayor Tom Menino some more time on national television. Music network VH1 was in the city on Saturday to interview bands, and asked Menino to join the crew at the Ames hotel to help film a Boston rendition of its weekly “Top 20 Video Countdown’’ hosted by Jim Shearer. The Mayor joined Shearer and Fun. frontman Nate Ruess for an amusing conversation about music and sports. After learning that the two men aren’t Red Sox fans, Menino apparently got a bit competitive and invited them to a game. The sports talk started after Menino mentioned that the Fun. song “We Are Young’’ was played during 100th anniversary festivities at Fenway Park. We’re told that VH1’s Boston Calling footage will air during Saturday’s countdown. . . . Boston Calling kicked off with a pre-party on Friday night at the Liberty Hotel. Guests at the bash included festival producer Brian Appel, sports PR guru Marty Appel, and author Leigh Montville.