Imagine listening to Beatles songs - outside, under a starry night - sung by a group that sounds a lot like the original four Liverpool lads.A Beatles tribute band called "Imagine: Remembering the Fab Four" will perform Saturday, July 28, at Grande River Vineyards. They'll be playing authentic vintage instruments and wearing late-1960s era attire."Our main goal is to recreate the enthusiasm and good vibe of the Beatles," band member Brad Armstrong said. "We try to look and sound like them."Armstrong is the group's George Harrison; Tom Coburn - who saw the Beatles perform at an early age in 1964, plays the part of John Lennon; Dan Burt plays the drums as Ringo Starr; and Rich Fazzi is Paul McCartney. The group formed in 1993 and has performed more than 800 shows across the United States and abroad. Armstrong and Fazzi joined the band in 2004 and 2006, respectively. They've also shared the stage with other artists, such as the Beach Boys, Chicago, Three Dog Night and the Temptations.Armstrong recalled playing at Grande River three years ago."It was awesome," he said. "It was a good time, good people, good food and certainly good wine."This benefit concert is for Colorado State University Horticulture Tree Fruit Research, one of a series of benefit concerts hosted by the vineyard's "Hear it through the Grapevine" series. Proceeds will go toward research to solve agricultural problems of local growers.There's always food for sale by a local caterer, and wine from Grande River by glass or by the bottle.What's special about the tree fruit research concert is the local food on the menu, said Grande River co-owner Naomi Smith. Berna B's will cater the event."They gather a lot of locally grown food for this barbecue," Smith said. "It's some of the best food I've ever had. They always do a cobbler to showcase some of the local fruit."With the music and the costuming, the band "takes you back in time," Smith said. "They're really skilled musicians."Imagine's repertoire includes about 60 Beatle songs, 35 of which concert-goers will hear Saturday night.