Los Angeles: Country singer Blake Shelton purchased five copies of her girlfriend Gwen Stefani's new album "This Is What the Truth Feels Like" as soon as it hit the shelves. Blake tweeted on Friday -- the same day the album was released -- a photograph of the copies that he bought, reports aceshowbiz.com. "I may have gone overboard...," Shelton captioned the image. Stefani was seemingly enthralled with Shelton's gesture as she wrote back in response to her beau's tweet: "OMG! Muse". In another tweet, Shelton revealed his favourite song on her new album. "My favorite song on your album is 'Rare'... Just thought I'd let you know," he posted. Stefani replied: "Hum, really? Wonder who that one is about?" She had previously admitted that her relationship with Blake influenced her new album. Stefani also revealed that the album's second single "Make me like you" was written with her new beau in mind.