Gleek alarms across the country are set for Monday, February 28th – as “Glee” star and Mercury Records artist Matthew Morrison premieres his debut single, “Summer Rain” on American Idol host Ryan Seacrest’s nationally syndicated morning radio show on KIIS-FM in Los Angeles. The official launch for “Summer Rain” at radio is scheduled for March 14th. And Matthew will perform “Summer Rain” live on The Tonight Show with Jay Leno on April 6th; and on The Ellen DeGeneres Show on April 11th. “Summer Rain” will be available March 8th on iTunes and all digital partners. “Summer Rain” was co-written by Matthew with Claude Kelly (Bruno Mars, Britney Spears, Christina Aguilera, to name a a few) and the Norwegian duo known as Espionage, who produced the track in New York City. Espionage (Espen Lind and Amund Bj