Credit: Andrew H. Walker/Getty Images Photo: Kellie Pickler at the 9th Annual Dressed to Kilt Charity Fashion Show in New York City on April 5, 2011

Country cutie Kellie Pickler has been added to 90210's Season 4 guest star lineup. According to TVLine, the Season 5 American Idol alum will play Sally, a — wait for it — country singer (surprise!). In a blantant instance of art meeting life, the lucky gal will get to perform "Tough," one of her hit singles, on The CW series.

While that's exciting for her, we're way more psyched for Justin Deeley's guest arc as Austin, Sally's sexy cowboy friend — and son of a country music superstar — who develops the hots for Naomi (AnnaLynne McCord). (If you don't know who Justin Deeley is, Google him; the guy looks good without a shirt. He even showed off his toned torso in a Season 3 episode of 90210 when he made a brief — but delicious — appearance as a stripper.)

Other Season 4 guest stars include Brandy, who will play a politico; Buffy the Vampire Slayer's Sarah Hagan, who will play one of Naomi's California University sorority sisters; CSI: Miami's Megalyn Echikunwoke, who will play Naomi's CU nemesis; and Privileged's Kristina Apgar, who will play Liam's (Matt Lanter) potential gal pal.

Don't miss the Season 4 premiere on September 13!

Sources: TVLine, TVLine