There’s something about a Little Feat concert on New Year’s Eve that feels especially right. Maybe it’s because the band — which formed in 1972 after lead vocalist and guitarist Lowell George, who was with Frank Zappa’s Mothers of Invention and keyboard player Bill Payne teamed up — has always stayed true to its roots. Arguably that’s the reason such renowned musicians as Jimmy Buffett, Dave Matthews, Bob Seger and Vince Gill count themselves among the ardent fans and occasional guests of the band.