Adele’s not letting her divorce hold her back from giving marriage advice, and her message to John Mayer is loud and clear: Do it!The 33-year-old British singer interviewed the 44-year-old crooner for SiriusXM, and marriage was a topic Adele did not shy away from.Mayer asked her point-blank if he should get married one day and Adele poured her heart out on exactly why she thinks marriage is all that it’s cracked up to be. “Oh yes, you should get married,” she said, “Yes.