“Alexander and the Terrible, Horrible, No Good, Very Bad Day” hits theaters Oct. 10, 2014, with a soundtrack that includes an original end-credit song from The Vamps, plus original songs from two of the film’s stars and score by Christophe Beck (“Frozen,” “The Hangover”). The six-song EP will be released in the U.S. by Walt Disney Records on Oct. 7, 2014; pre-order begins today. British pop rock band The Vamps was called on to write and perform the end-credit song “Hurricane.” The group filmed a music…