JoJo is pretty in purple as she attends the Q102′s Sexy Singles Party held at The Hotel Palomar on Thursday night (January 26) in Philadelphia, Penn.The 21-year-old musician, wearing Christian Louboutin heels, tweeted after the party, “Philly… Is it okay that I’m in love with you? If it isn’t love, you’ve certainly seduced me…Until next time…. Off to DC! Xo”