Today is looking like it’s going to be beautiful outside so you might want to go out and get some of the last bits of summer remaining. Philadelphia Weekly’s Concerts in the Park series is back at Rittenhouse Park, and there should be no question of rain this week. Hip hop collective Ground Up, who just released a box set entitled SUPERNATURAL, will be headlining this evening’s festivities. To make the night extra special, they’ve been hard at work rehearsing with their Bucks County pals The Lawsuits, who will be backing them on stage as well as opening the showcase with their own set. If you were wondering what a collaboration between the two would sound like, then check out one of my favorite HotBox Sessions below. It should be a blazin’ performance this evening in the park. Rittenhouse Square Park, 19th & Walnut Sts., 7pm, Free, All Ages – Q.D. Tran