If it’s hard to keep straight all singing/songwriting competition series out there, here is another one for ya: American Idol executive producer Nigel Lythgoe will executive produce CMT’s Next Superstar, a competition for country singer/songwriters. Also exec producing the series, set to premiere in April, is former CMT head of development Bob Kusbit, who left the network at the end of 2010 to return to producing. The previous reality series for country singers, Nashville Star, aired on NBC and USA, with CMT rebroadcasting the show when it was on NBC.