First look at Ashley Benson on 'How I Met Your Mother'!

Ashley Benson cozies up to Josh Radnor in this first look pic from How I Met Your Mother.

In the episode “Ring Up!”, Barney (Neil Patrick Harris) begs Ted (Radnor) to continue seeing his much younger, much wilder girlfriend (Benson), even though Ted has nothing in common with her.

Meanwhile, Robin (Cobie Smulders) must adjust to the power of the bling.

“Ring Up!” airs Monday, January 21st @ 8PM ET/PT on CBS.