Gleeks everywhere are singing for joy! Matthew Morrison released his debut single, “Summer Rain,” and stopped by Fox All Access to tell us all about it. Host, Chris Leary asked him the meaning behind the single he helped co-write and what was quite adorable was how Matthew blushed when answering this simple question. The official launch for “Summer Rain” at radio is scheduled for March 14th, but keep your ears and eyes open, Morrison’s upcoming debut album is set for May 10th. We’re definitely excited and looking forward to it! In the meantime, catch one of Matthew’s great friends, Gwyneth Paltrow , as she returns to ”Glee” this Tuesday, March 8th, as the substitute teacher Holly Holiday. Holly and Mr. Schue dance a tango to Prince’s “Kiss.” Oh La La!Source