Country Star Miranda Lambert to Duet With Dia on 'The Voice'

The first season of "The Voice" is almost over, but the serious competition is just beginning. Next week brings the finale episodes, which include the final four contestants singing original singles as well as duets with their coaches.

But Dia Frampton, the contestant on Team Blake, won't just be singing with her coach Blake Shelton. She'll also be singing with his wife! Country star Miranda Lambert (who tied the knot with Shelton recently) will be appearing on the show on the very last live results episode to sing a duet with Dia.

Dia Frampton is one of the favorites to win, as her creative cover of Kanye West's "Heartless" blew up on iTunes after she performed it on the first live episode and even cracked Billboard's Hot 100. She faces tough competition in Javier Colon, another favorite who's cover of Coldplay's "Fix You" hit #8 on iTunes the day after he performed it.

There's no word yet on what Dia and Miranda will sing, and whether it will be an existing song or an original one. Since the song won't be part of the competition, the two have free reign to do whatever pleases them...as long as it pleases NBC's sales and marketing departments as well.

Tune in on Wednesday the 29th at 8pm for the duet and the final results. Be sure to watch the day before, Tuesday the 28th at 9pm, to watch Dia Frampton, Javier Colon, Beverly McClellan and Vicci Martinez perform their originals.