Welsh opera star Katherine Jenkins has been furiously trying to scotch “untrue” rumors she had an affair with soccer star David Beckham. The singer and “Dancing With the Stars” contestant used her Twitter page to rebut claims gathering steam on the social-networking site. Jenkins tweeted yesterday, “Dear Twitter friends, I’ve read some horrible rumours on here and want u 2 know I absolutely deny I’ve had an affair with David Beckham.” She continued, “The rumours are very hurtful, untrue & my lawyers tell me actionable.” Jenkins goes on to say she has only met Beckham — who’s married to Spice Girl Victoria Beckham — twice: once in 2010 and once in 2012 during an evening out in London’s West End. “We were out in a group of friends & it was just a normal fun evening out,” she said, “Just so we are clear I have never been on my own with him and never arranged to meet up.” Reps for Beckham added: “We have to deal with this type of nonsense on Twitter. One minute David is dead, then the more scurrilous rumors, there is no truth to any of it.”