I don't know why I didn't think of this sooner. If you missed Jelynn on recent episodes of Las Vegas, Cavemen, and Samantha Who? her episodes are available to watch online for free at NBC.com and ABC.com.
This wont last forever, so watch them while you still can.
To see her episode of Las Vegas, click here, and look for the following episode information:
Season 5 Episode 1 (9/28/07): A Hero Aint Nothin' But a Sandwich
To see either Cavemen or Samantha Who? click here, look for the respective show and the follwing information:
Cavemen: Episode 1 (Airdate 10/2/07) Her Embarrassed of Caveman
Samantha Who: Episode 1 (Airdate 10/15/07) Pilot