Top 10 Country Music Trio's

The Dixie Chicks

By: Hector Mata/Getty Images

LOS ANGELES, UNITED STATES: Singers from the country group Dixie Chicks receive their award for the Best Country Album at the 41st Grammy Awards at the Shrine Auditorium in Los Angeles 24 February. (DIGITAL IMAGE) Hector MATA/hmb (Photo credit should read HECTOR MATA/AFP/Getty Images)

Top 10 Country Music Trio's

Edens Edge

By: Rick Diamond/Getty Images

Edens Edge attends the 60th Annual BMI Country Awards at BMI on October 30, 2012 in Nashville, Tennessee.

Top 10 Country Music Trio's

The Gatlin Brothers

By: Jason Merritt/Getty Images

The Gatlin Brothers arrive at the 47th Annual Academy Of Country Music Awards held at the MGM Grand Garden Arena on April 1, 2012 in Las Vegas, Nevada.

Top 10 Country Music Trio's

Glorianna

By: Royce Degrie/Getty Images

NASHVILLE, TN - JULY 30: Glorianna attends the Pepsi/Billboard Summer Beats concert at Cannery Ballroom on July 30, 2012 in Nashville, Tennessee. (Photo by Royce DeGrie/Getty Images for PEPSI)

Top 10 Country Music Trio's

Lady Antebellum

By: Mark Davis/Getty Images

Lady Antebellum onstage during the 2012 American Country Awards at the Mandalay Bay Events Center on December 10, 2012 in Las Vegas, Nevada.

Top 10 Country Music Trio's

Pistol Annies

By: Jason Kempin/Getty Images

Pistol Annies attend the 60th Annual BMI Country Awards at BMI on October 30, 2012 in Nashville, Tennessee.

Top 10 Country Music Trio's

Rascal Flatts

By: Rick Diamond/getty Images

Rascal Flatts attends 2012 CMT Artists Of The Year at The Factory at Franklin on December 3, 2012 in Franklin, Tennessee.

Top 10 Country Music Trio's

Shedaisy

By: Rick Diamond/Getty Images

The Shedaisy sisters test drives the all new 100% electric Nissan LEAF at the Loews Vanderbilt Hotel on June 7, 2011 in Nashville, Tennessee.

Top 10 Country Music Trio's

Sugarland....who began as a trio!

By: Peter Kramer/Getty Images

The ORIGINAL Sugarland, who began as a TRIO attends the 39th Annual Country Music Association Awards at Madison Square Garden November 15, 2005 in New York City.

Top 10 Country Music Trio's

The Band Perry

By: Rick Diamond/Getty Images

The Band Perry performs during the 2012 Country Christmas concert on November 3, 2012 at the Bridgestone Arena in Nashville, Tennessee.

The special airs Thursday, December 20 from 9:00-11:00 p.m., ET on the ABC Television Network.