Amid swirling rumors and speculation that Blake Shelton and Gwen Stefani’s relationship is heading toward marriage, Stefani recently found herself “tongue-tied” when the subject came up in a recent interview.  When Ryan Seacres tasked Gwen – who announced her divorce from singer Gavin Rossdale last year – if she’d ever get married again, she said, “Everything is going so quickly. … I’m in the moment and, um, look at me, you’ve got me tongue-tied.” While Stefani makes no mention of any pending nuptials between her and Shelton, a reported source close to Blake recently told Us Weekly that, “They want to get married before the end of the year.”