James Shanahan (born August 7, 1977), known professionally as Jamey Jasta, is an American vocalist, best known as the lead singer of metalcore band Hatebreed and sludge metal band Kingdom of Sorrow. Jasta also fronts metalcore band Icepick. Prior to Hatebreed, he fronted the hardcore band Jasta 14.

Jasta owns Stillborn Records, a hardcore- and metal-based record label from West Haven, Connecticut, and a "rock-themed apparel" line called Hatewear.

In 2011, Jasta released a solo album titled Jasta, collaborating with Randy Blythe and Mark Morton (Lamb of God), Zakk Wylde, Philip Labonte (All That Remains), and Tim Lambesis (As I Lay Dying). He released a second album under the name "Jasta" called "The Lost Chapters" in 2017 and a third album "The Lost Chapters: Volume 2, in 2019. He would release his fourth solo album titled "...And Jasta For All" on May 17, 2024.

Jasta was the host for MTV's Headbangers Ball from 2003 to 2007.

Jasta created the music for "Stat of the Day" for the nationally syndicated radio and television talk show The Dan Patrick Show. Jasta appeared on air with Dan Patrick on January 25, 2013, discussing the making of the song.

He, as of 2013, refrains from smoking, drinking, and doing drugs but does not affiliate himself with the straight edge subculture.

Jasta's debut solo album, Jasta, was released in July 2011 through eOne Music. In Europe, the album was released via Century Media Records. AllMusic scored the album 4 out of 5 stars, while Blabbermouth.net gave it 6.5 out of 10 stars.

In 2018, Jasta produced Dee Snider's fourth solo album, For the Love of Metal. He also produced the follow-up that was released in the summer of 2021.