Legendary rockers THIN LIZZY have recruited GUNS N' ROSES guitarist Richard Fortus as the temporary replacement for Vivian Campbell, who will return to DEF LEPPARD next month.Fortus joined THIN LIZZY on stage at the final gig of the band's U.S. tour on April 1 at Vic Theatre in Chicago (see video below) and will take over for Campbell after LIZZY's May 28 concert at Slaine Castle, Ireland. Campbell writes on his Facebook page, "Well, that was it: my last U.S. show with LIZZY — and it was a great one to end on. New guitarist Richard Fortus came and played a couple of songs. I have one final gig with them in Ireland, and the very next day we start DEF LEP rehearsals." THIN LIZZY's latest reincarnation includes original-era members Scott Gorham, Brian Downey and Darren Wharton. Also on board are Campbell, former WHITESNAKE bassist Marco Mendoza and ex-THE ALMIGHTY frontman Ricky Warwick. In a recent interview with Gibson.com, Campbell stated about his involvement with THIN LIZZY, "It's been a tremendous pleasure to tour with THIN LIZZY. Playing with a band that meant so much to me in my formative years has really rekindled my passion for the instrument again. I haven't been this excited about guitar playing since I was in my teens!" When asked if he would like to be a part of future THIN LIZZY tours, should he be available, Vivian said, "Absolutely! However, I continue to be fully committed to DEF LEPPARD, and we're going to be on the road from June of this year, so LIZZY [will be using] a replacement for me for their continuing summer dates. They have very kindly offered me the opportunity to come back when my schedule with DEF LEPPARD opens up, and you can bet that I'll be there in a heartbeat!"