Video, Images: Britney On Glee Tonight

Britney Spears makes her long-awaited appearance on "Glee" tonight. We have photos and news on the plot line.

Slideshow: Britney On Glee

Spears is the focus of an episode about how Glee club member Brittany has a connection with Spears.

In the episode, New Directions performs Spears' biggest songs, including "Toxic,"  "Baby One More Time" and "Me Against The Music."
Spears also makes a cameo appearance in the episode.

"Working on GLEE was an amazing experience," said Spears earlier this month. "The cast is so talented, and I really had an incredible time working with Ryan Murphy."

In the "Britney/Brittany" episode, MR. SCHUESTER (Matthew Morrison) insists that the glee club perform adult contemporary music at the school assembly, but the kids have other plans.

As New Directions mounts its campaign to perform Spears’ greatest hits, they learn that their own BRITTANY (Heather Morris) has a connection to the famous performer.

Meanwhile, Will meets EMMA's (Jayma Mays) new love interest, DR. CARL (John Stamos), who sparks a rivalry between the two men as they vie for her attention.