Kendra Wilkinson

Um, just what sort of magazine is Marshall laboring to spend some quality time with in a restroom, anyway?!

Kendra Wilkinson, aka one of the "retiring" Girls Next Door, has rounded out the oh-so-glossy guest-star cast for a January episode of CBS' How I Met Your Mother.

Wilkinson will join Kim Kardashian (Keeping Up with the Kardashians), Heidi Montag (The Hills) and Spencer Pratt ("I'm With Heidi!") in taunting Marshall during his quest to find stall of solitude. All of the aforementioned C-listers will speak to our beleaguered lawyer from the cover of his tabloid of choice, "Them Weekly."

Wilkinson recently went public with her breakup with Playboy extraordinaire Hugh Hefner, as it was simultaneously announced that she is engaged to Philadelphia Eagles wide receiver Hank Baskett.