Lauren Conrad said a quick goodbye to Dancing With the Stars performer Derek Hough last night, then drove away with from LA's Playhouse with a big smile on her face. It was the second night in a row of partying for LC after she stopped by the Roosevelt in leather leggings on Wednesday. Lauren's been single, since her breakup with Kyle Howard; though, LC was momentarily linked to Teen Wolf's Colton Haynes. Derek is also reportedly single; however, he's spending long days in the dance studio with his new prime-time partner, Ricky Lake. Whether Lauren and Derek are more than just friends remains to be seen, but it's certain she'll be busy for the rest of the year. Lauren's launching her own makeup line along with new collections for her Paper Crown brand.