She is known for providing the voice to Jazz Fenton in Danny Phantom and Wasp in The Avengers: Earth's Mightiest Heroes.

[2][3] In addition, O'Shaugnessey has provided voices to English-language dubs of anime and video game series, such as Sora Takenouchi in Digimon: Digital Monsters and Ino Yamanaka and Konohamaru Sarutobi in Naruto.

O'Shaughnessey was born on September 15, 1971 to Peggy (née Varani) and Mike O’Shaughnessy in Grand Rapids, Michigan.

[1][5] She is perhaps best known for her roles as Sora Takenouchi from the first and second seasons of Digimon (her first major voiceover role), Jazz Fenton in Danny Phantom, Ino Yamanaka and Konohamaru Sarutobi in Naruto, Nelliel Tu Odelschwanck in Bleach, and Janet Van Dyne/Wasp in The Avengers: Earth's Mightiest Heroes.

[6] She has also worked in the video game industry, where she voiced Genis Sage in Tales of Symphonia and KOS-MOS in Xenosaga Episode II: Jenseits von Gut und Böse.