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Is there some bad blood between Kirstie Alley and Melissa McCarthy? According to a new report, Alley is pretty upset about a storyline introduced in “Mike & Molly.”

National Enquirer claims that Alley considers the new direction of “Mike & Molly” to be a direct slight to her. Because McCarthy’s character talks about wanting to pursue a career in musical theater and because in her new TV Land series Alley plays a musical theater star, she reportedly considered this to be a personal insult.

“Kirstie was flabbergasted. She feels like the sudden plot change is a slap in the face,” a source tells National Enquirer. “She’s not taking the adjust­ment to Melissa’s character lightly. She now sees Melissa as her com­petition — and has let her know it.”

The insider adds, “With vehicles like ‘Veronica’s Closet’ — in which she gained a lot of weight — and ‘Fat Actress,’ Kirstie felt she became everybody’s funny fat lady. That is, until Melissa came on to the scene … Now Kirstie believes that Melissa has crossed the line with the new plot line on her show.”

Of course, this could all be a bunch of BS. Alley’s publicist denies the claims, while another source says the antagonism is entirely one-sided. “[McCarthy] feels it’s the more the merrier as far as flabby funny ladies are concerned,” the insider says.

Do you think there’s any truth to this rumor?