Dáithí Sproule
Dáithí Sproule( born 23 May 1950) is a guitarist and singer of traditional Irish music.
His niece is the singer Claire Sproule.
Astrid North
Astrid North( Astrid Karina North Radmann; 24 August 1973, Berlin – 25 June 2019, Berlin) was a German soul singer and songwriter.
She was the singer of the German band, with whom she released five Albums.
As guest singer of the band she published three albums.
Caspar Babypants
Caspar Babypants is the stage name of children's music artist Chris Ballew, who is also widely known as the singer of The Presidents of the United States of America.
Bernie Bonvoisin
Bernard Bonvoisin, known as Bernie Bonvoisin( born 9 July 1956 in Nanterre, Hauts- de- Seine), is a French hard rock singer and film director.
He is best known for having been the singer of Trust.
He was one of the best friends of Bon Scott the singer of AC/ DC and together they recorded the song" Ride On" which was one of the last songs by Bon Scott.
O Valencia!
" O Valencia!" is the fifth single by the indie rock band
The Decemberists, and the first released from their fourth studio album," The Crane Wife".
The music was written by The Decemberists and the lyrics by Colin Meloy.
It tells a story of two star- crossed lovers.
The singer falls in love with a person who belongs to an opposing gang.
At the end of the song, the singer's lover jumps in to defend the singer, who is confronting his lover's brother( the singer's" sworn enemy") and is killed by the bullet intended for the singer.
Panda (Astro song)
" Panda" is a song of the Chilean band Astro and is the fifth song of the homonymous album of the year 2011.
The song was composed and produced by the singer of the band Andrés Nusser and released like third single of the album on February 1, 2013.
Demi Lovato
Demetria Devonne Lovato (born August 20, 1992) is an American singer, songwriter, actress, and television personality.
She began her career in 2002 appearing on the children's television series "Barney & Friends", before rising to prominence for portraying Mitchie Torres in the Disney Channel musical television film "Camp Rock" (2008) and its sequel  (2010).
Lovato has released six studio albums:
"Don't Forget" (2008), "
Here We Go Again" (2009), "Unbroken" (2011)
, "Demi" (2013),
"Confident" (2015), and "Tell Me You Love Me" (2017); all of which debuted in the top five of the "Billboard" 200.
She has earned seven top-20 tracks on the "Billboard" Hot 100 with "
This Is MeHere
We Go AgainSkyscraperGive
Your Heart a BreakHeart AttackCool for the SummerSorry
Not Sorry".
In total, she has sold over two million albums and 20 million singles in the United States.
On television, Lovato has starred as the titular character on "Sonny with a Chance" (2009–2011), served as a judge and mentor on "The X Factor USA" in its second and third seasons, and appeared as a recurring character on "Glee".
Her struggles with several personal issues have received significant media attention in the 2010s; in response to which in response to which she published the book "Staying Strong: 365 Days a Year" (2013), and released a YouTube documentary about her life and career,  (2017).
Lovato is a pop, pop rock, and R&B artist.
She has earned numerous awards and nominations, including an MTV Video Music Award, 14 Teen Choice Awards, five People's Choice Awards, two Latin American Music Awards, three Brit awards nominations and two Grammy nominations.
She also holds one "Guinness World Record", and was included on the annual "Time" 100 list of the most influential people in the world in 2017.
Outside the entertainment industry, Lovato is an outspoken activist for several social causes.
Kristian Leontiou
Kristian Leontiou (born February 1982) is a British singer of Greek Cypriot descent, and is the singer for the indie rock band One eskimO.
Heart by Heart
"Heart by Heart" is a song by Demi Lovato from  soundtrack.
The song starts off slow and stripped down with Lovato’s clear voice accompanied by a piano and slowly builds to a rock crescendo.
Billy Milano
Billy Milano is a Bronx- born heavy metal musician now based in Austin, Texas.
He is the singer and- occasionally- guitarist and bassist of crossover thrash band M.O.D., and he was also the singer of its predecessor, Stormtroopers of Death.
He was also the singer of United Forces, which also featured his Stormtroopers of Death bandmate Dan Lilker.

Question: Which country the performer of song Heart By Heart is from?
Answer: American