Question: What is the nationality of the actor who wrote, produced, and starred in "Popstar: Never Stop Never Stopping" ?

Context articles: David Kersh
If I Never Stop Loving You (song)
Popstar: Never Stop Never Stopping
Never Stop Singing
Never Stop Doing What You Love
Never Stop (Echo &amp; the Bunnymen song)
Sonia (singer)
I'll Never Stop Loving You (Gary Morris song)
May Death Never Stop You
Andy Samberg

Charles David Kersh (born December 9, 1970 in Humble, Texas) is an American country music singer who made his debut in 1996.
 His first album, "Goodnight Sweetheart", was released that year, producing four singles on the "Billboard" Hot Country Singles & Tracks charts.
 A second album, titled "If I Never Stop Loving You", was released a year later, producing three additional chart singles.
 Although he never charted after 1998, Kersh remained active in the music business until 2005.
"If I Never Stop Loving You" is a song written by Skip Ewing and Donny Kees, and recorded by American country music artist David Kersh.
 It was released in December 1997 as the lead-off single and title track from the album "If I Never Stop Loving You".
 The song reached number 3 on the "Billboard" Hot Country Singles & Tracks chart and number 10 on the Canadian "RPM" Country Tracks chart, his most successful single on that chart.
 It was Kersh's last top ten hit.
Popstar: Never Stop Never Stopping is a 2016 American mockumentary comedy film directed by Akiva Schaffer and Jorma Taccone and written, produced by and starring Andy Samberg, Schaffer and Taccone.
 Also produced by Judd Apatow, it co-stars Sarah Silverman, Tim Meadows, Imogen Poots, Joan Cusack, and Maya Rudolph.
Never Stop Singing is a one-hour public television documentary film produced by Peter B Myers about choral music in Minnesota that premiered on Twin Cities Public Television (TPT) on June 7, 2009.
 The film was produced by Peter Myers and co-produced and edited by Skip Davis between February 2008 and April 2009.
 The documentary includes video from more than 40 interviews with well-known Minnesota composers, conductors, and singers.
Never Stop Doing What You Love is a not-for-resale compilation of various Paul McCartney and Wings songs created for the employees and clients of Fidelity Investments, a company in the financial services industry.
 The ex-Beatle became the mutual fund giant's new spokesman in 2005 in a campaign entitled "This Is Paul", and the disc was issued in support of McCartney's U.S. tour of the same year.
 On the day of its release, company employees were treated to a special recorded message by Paul himself informing them that "Fidelity and I have a lot in common" and urging them to "never stop doing what you love."
 McCartney received considerable criticism for his celebrity endorsement of Fidelity Investments, which some considered to be a vulgar attempt to increase his already astounding wealth.
"Never Stop" is a single which was released by the British post-punk band Echo & the Bunnymen on 8 July 1983.
 It reached number fifteen on the UK Singles Chart the same month.
 The title track on the 12-inch single is a remixed version called "Never Stop (Discotheque)" and is another minute and fifteen seconds longer.
Sonia (born Sonia Evans; 13 February 1971) is an English pop singer from Liverpool.
 She is perhaps best known for her 1989 UK number one hit "You'll Never Stop Me Loving You" and for representing the United Kingdom in the 1993 Eurovision Song Contest, where she finished second with the song "Better the Devil You Know".
 Between 1989 and 1993, she had 11 UK Top 30 hits, including "Listen to Your Heart" (1989), "Counting Every Minute" (1990) and "Only Fools (Never Fall in Love)" (1991).
 In 1994, she starred as Sandy in a West End revival of the musical "Grease", while on television she appeared as Bunty in the 1998 BBC comedy series "The Lily Savage Show".
"I'll Never Stop Loving You" is a song written by Dave Loggins and J.D. Martin, and recorded by American country music artist Gary Morris.
 It was released in July 1985 as the first single from the album "Anything Goes".
 "I'll Never Stop Loving You" was Gary Morris' second number one country hit.
 The single went to number one for one week and spent a total of fifteen weeks on the country chart.
May Death Never Stop You (or May Death Never Stop You: The Greatest Hits 2001–2013) is a greatest hits compilation album by My Chemical Romance, spanning the band's entire career.
Andrew David Samberg (born David A. J. Samberg; August 18, 1978) is an American actor, filmmaker, musician and comedian.