Bridgit Mendler: '10 on Top' Co-Host!

Bridgit Mendler is counting down the week’s most talked about entertainment stories on MTV today!

The 19-year-old actress/singer will be co-hosting the network’s hit show 10 on Top and you won’t want to miss it.

PHOTOS: Check out the latest pics of Bridgit Mendler

The episode will feature interviews with Hayden Panettiere, Bruno Mars, Victoria Justice, the cast of Pretty Little Liars, Switched at Birth and many more.

“In between takes, Bridgit kept singing the chorus from Rihanna‘s “Diamonds” – it’s one her favorite songs,” said the show’s host Lenay Dunn.

Make sure you watch Bridgit today (October 20th) @ 12:30 PM ET on MTV.