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Outside its handful of stars, country rock's greatest significance was on artists in other genres, including the Band, Grateful Dead, Creedence Clearwater Revival, the Rolling Stones and George Harrison's solo work. It also played a part in the development of Southern rock, which, although largely derived from blues rock, had a distinct southern lilt, and it paved the way for parts of the alternative country movement. The genre declined in popularity in the late 1970s, but some established artists, including Neil Young, have continued to record country-tinged rock into the twenty-first century. Country rock has survived as a cult force in Texas, where acts including the Flatlanders, Joe Ely, Butch Hancock, Jimmie Dale Gilmore and California-based Richard Brooker have collaborated and recorded. Other performers have produced occasional recordings in the genre, including Elvis Costello's "Almost Blue" (1981) and the Robert Plant and Alison Krauss collaboration "Raising Sand", which was one of the most commercially successful albums of 2007. In 2013 British country rock band Rocky and the Natives released "Let's Hear It for the Old Guys" with two American members, drummer Andy Newmark and acoustic guitarist Bob Rafkin. Rafkin had written "Lazy Waters" for The Byrds from the 1971 album Farther Along, and Andy Newmark had played on the 1973 Gene Parsons album Kindling. Later in 2013 Rocky and the Natives' country rock cover of John Lennon's "Tight A$" was included on the "Lennon Bermuda" album.