Country singer Taylor Swift's lucky guitar which is up for grabs on the Internet,has sparked a bidding war. The 20-year-old singer had put it up for auction. and in just six days,bids for the instrument embellished with Swift's lucky number 13 - have reached USD 8000,Contactmusic reported. The person who gets the highest bid will be sold the guitar on 26 February . All proceeds from the online auction will benefit the Country Music Hall of Fame and Museum in Nashville,Tennessee.