The American Idol alum will play Sally, the country-singing cousin of local cowboy Austin (Justin Deeley).
The role shouldn’t be much of a stretch for Pickler, who has had four songs on Billboard‘s Hot Country chart. In fact, she will perform one of those singles, “Tough,” during the episode.
Pickler is not the sole singer appearing on the new season of 90210, debuting Sept. 13. As TVLine previously reported, Brandy has been tapped for a major Season 4 arc. Other new additions include Buffy the Vampire Slayer‘s Sarah Hagan, CSI: Miami‘s Megalyn Echikunwoke and Privileged‘s Kristina Apgar.