Last night'sSouth Park anniversary concert at Red Rocks Amphitheatre in Morrison, Colorado included a surprise reunion of Geddy Lee and Alex Lifeson of Rush. The pair combined with Matt Stone on Closer to the Heart. While Lee has kept a low musical profile, Lifeson has continued performing with his group Envy of None. Asked by Eddie Trunk during an edition of his SiriusXM show whether he and Geddy might get around to playing together in the future, Alex replied, "If there's something that comes up in the future, an opportunity for us to do something, we'll decide over a cup of coffee what that'll be", but he added, "We had such a great history and did so much great stuff together, it's really not a big deal if, for the rest of our lives, we're just best friends."