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Shelton's manager, Brandon Blackstock, proposed to the "Since U Been Gone" hit-maker last month, and the couple has been busy making plans for the nuptials.
The "Honey Bee" star voiced a desire to sing for the newlyweds, and Clarkson now reveals she has taken him up on his offer.
In an interview on country music radio station K-Frog, she says, "Blake actually is going to play at our reception, so we're pretty excited."
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Clarkson and Blackstock are set for an autumn 2013 wedding, and the singer admits she is already feeling stressed as she plans the nuptials.
She adds, "We're just kind of overwhelmed with the planning of the wedding. We're actually thinking the fall this year. We're thinking outside. We are trying to make it small, but it is hard. Once you've got one person, you have to invite five others, and then five others ... I literally had a breakdown two weeks ago about the wedding list."
"I'm actually terrified at everyone watching me walk down an aisle; that is like the worst thing ever."
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