Question: What activity are both  Roman White and Kelsea Ballerini known for?

Context paragraphs:
Yeah Boy: "Yeah Boy" is a song co-written and recorded by American country pop singer Kelsea Ballerini for her debut studio album, "The First Time" (2015).  Ballerini co-wrote the song with Forest Glen Whitehead and Keesy Timmer.  It was released to American country radio on October 10, 2016 as the album's fourth and final single.  The song garnered a positive reception from critics praising its upbeat nature and Ballerini's bubbly charm for being a return to her first two singles.

Kelsea Ballerini (EP): Kelsea Ballerini is the debut extended play (EP) by American country pop singer Kelsea Ballerini.  It was released on November 24, 2014, by Black River Entertainment.  The EP contains five tracks that would later be included on Ballerini's debut full-length album, "The First Time", in 2015, including the singles "Love Me Like You Mean It", "Dibs", and "Yeah Boy".

Legends (Kelsea Ballerini song): "Legends" is a song by American country pop singer Kelsea Ballerini for her forthcoming second studio album, "Unapologetically" (2017).  Ballerini co-wrote the track with Hillary Lindsey, Raymel Menefee and Forest Glen Whitehead.  The song was released as a digital single on June 7, 2017 and impacted American country radio on July 10, serving as the lead single for the album.

Love Me Like You Mean It: "Love Me Like You Mean It" is a song co-written and recorded by American country pop singer Kelsea Ballerini.  Ballerini co-wrote the song with Josh Kerr, Forest Glen Whitehead and Lance Carpenter.  It was released on July 8, 2014 as Ballerini's debut single and the lead single from her debut studio album, "The First Time", released on May 19, 2015, by Black River Entertainment.  The song is about a young woman showing interest in a man.

Dibs (song): "Dibs" is a song co-written and recorded by American country pop singer Kelsea Ballerini for her debut studio album, "The First Time" (2015).  Ballerini co-wrote the song with Josh Kerr, Ryan Griffin, and Jason Duke.  It was released to American country radio on July 20, 2015 as the album's second single.

Unapologetically: Unapologetically is the upcoming second studio album by American country music artist Kelsea Ballerini.  It is set to be released on November 3, 2017.  Ballerini announced the album's title and release date on July 25, 2017.  In August, the album's track listing was first revealed to fans during a four-day check-in event over the mobile app Swarm.

The First Time (Kelsea Ballerini album): The First Time is the debut studio album by American country pop singer Kelsea Ballerini.  It was released on May 19, 2015, by Black River Entertainment.  The album's track listing and cover art was released on April 1, 2015.  With the album's first three singles all reaching number one on the "Billboard" Country Airplay chart, Ballerini became the first new female artist to send her first three releases to the top of the charts.

Peter Pan (Kelsea Ballerini song): "Peter Pan" is a song co-written and recorded by American country pop singer Kelsea Ballerini for her debut studio album, "The First Time" (2015).  Ballerini co-wrote the song with Forest Glen Whitehead and Jesse Lee.  It was released to American country radio on March 21, 2016 as the album's third single.  The song is a country pop ballad about a lost love being compared to the song's namesake as a metaphor for being immature and having a tendency to run off to his own fantasy.

Kelsea Ballerini: Kelsea Nicole Ballerini (born September 12, 1993) is an American country pop singer and songwriter.  She is signed to Black River Entertainment, and released her first album "The First Time" in 2015.  She received a nomination for Best New Artist at the 2017 Grammy Awards.

Roman White: Roman White is a music video and film director who has directed most of Carrie Underwood's videos.  He has also directed music videos for Kelly Clarkson, Florida Georgia Line, Kelsea Ballerini, Cassadee Pope, Josh Groban, Thomas Rhett, Danielle Bradbery, Kellie Pickler, Hunter Hayes, Maddie & Tae, Taylor Swift, Justin Bieber and more.

Supporting paragraphs: Roman White Kelsea Ballerini
Answer: music