Adam Levine has jokingly suggested Gwen Stefani and Blake Shelton “can’t afford” him for their wedding. The 51-year-old singer and Blake, 44, announced their engagement via Instagram in October, but their friend and fellow former ‘Voice’ coach has insisted there are currently no plans for him to perform at their nuptials, despite the pair previously voicing their intention to hire him as their entertainment. He quipped: “They can’t afford me.” Despite his words, the 42-year-old singer has remained in touch with the couple amid the coronavirus crisis, and he’d relish the opportunity to perform …