Shawn Mendes has created his own Fender guitar to raise funds for charity.The In My Blood singer has teamed up with the axe men at Fender to craft a new floral-accented six-string, and all sales of the limited edition MusicMaster model will benefit his Shawn Mendes Foundation.Mendes was inspired by a classic Fender design from 1965 as he came up with the new instrument, which features the Shawn Mendes Foundation logo engraved in the neck plate.The guitar is intended for beginners, who want to