Like pretty much everyone else in the world who's ever seen a Yeah Yeah Yeahs show, I am a big Karen O. fan. But I think Metric frontwoman Emily Haines might just shock us all and take Ms. O's unofficial title as Most Entertaining Frontwoman Ever. Why? Because all Haines needs to do is dance around in street clothes holding a tambourine and everyone freaks out. It's the same kind of energy, but without all the fanfare. Which you really don't need, because Metric's music is good enough to stand on its own. Despite stiff competition from Sly & Robbie and Modest Mouse, the Broad Street stage was totally maxed out last night, and after seeing how fast the band's most recent Showbox gig sold out, I predict it won't be long before Metric's filling arenas just like the Yeah Yeah Yeahs. And while Fantasies, the band's last synthpop record, isn't perfect, the best songs from that record (particularly "Gimme Sympathy," "Collect Call" and the album's single, "Help I'm Alive") sounded even better in person, and the songs I don't totally love on the record, like "Gold Guns Girls," sounded so good as to make me want to go home and immediately revisit those tracks to figure out why I didn't like them at first. And when a performance not only makes you love your favorite songs even more, but also start to like songs you didn't like before, you know that band is special. I pity the fools who went to see Modest Mouse instead, because next time Metric plays Bumbershoot, they'll be on the mainstage. I'd bet money on it.