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Taylor Swift never, ever wants to hang out with Carrie Underwood. A source tells Us Weekly that the country stars are planning to avoid each other at Sunday's 2013 Grammy Awards. According to the insider, Grammy execs were ordered to keep Swift, 23, and Underwood, 29, "from crossing paths" at the Feb. 10 show "since they hate each other!" Says a Swift pal, "Taylor feels Carrie is always rude to her, so she steer clear of her." (A Grammy rep counters, "No requests were received from either artist.") Read more.