 Complete the following phrase:  In 2004, EWF and Chicago embarked upon a joint national tour, which gave rise to a DVD of a concert that took place at Los Angeles Greek Theater titled Chicago  Earth, Wind  Fire  Live at the Greek Theatre. This DVD was released on June 28, 2005, and was certified Platinum in the US by the RIAA. Chicago and EWF later collaborated for a new recording of Chicagos ballad If You Leave Me Now, that was included on Chicagos 2005 compilation album Love Songs. At the 