VIDEO: Sneak Peeks - Watch Josh Groban on Tonight's' WHO DO YOU THINK YOU ARE?

Josh Groban is featured on this Sunday's episode of TLC's WHO DO YOU THINK YOU ARE, airing at 10/9c on TLC.

In the episode, as the award-winning singer digs into his eight-times great-grandfater's successful life in Germany, he has an uneasy feeling as to why he gave it all up. Watch a sneak peek below!

Click here to watch a sneak peek of Groban as learns that one of his ancestors was a music teacher.

Groban recently announced his new solo album STAGES featuring famous movie and theatre songs. The album will be released on April 28th and will be followed by a nationwide tour.

Possessing one of the most outstanding and instantly recognizable voices in music, singer, songwriter, and actor Josh Groban has entertained fans across the globe with his multi-platinum albums and DVDs (25 million sold worldwide), electrifying live performances, and comedic film and television appearances.

Groban is the only artist who has had two albums appear on the Top 20 Best-Selling Albums list of the past decade, according to Billboard. He has appeared in the feature film "Crazy, Stupid, Love," as well as on NBC's "The Office" and CBS' "The Crazy Ones", and in 2011 completed a sold-out world tour. In February of 2013, Josh released his 6th studio album entitled "All That Echoes" which debuted at No. 1 on the Billboard Top 200 chart. In October of 2013, Groban kicked off the North American leg of his "In The Round" tour.

An active arts education philanthropist and advocate, Groban is a member of Americans for the Arts Artists Committee and Groban's Find Your Light Foundation helps enrich the lives of young people through arts, education, and cultural awareness.