Question: Jacoby Shaddix and Chris Robinson, is which nationality?

Context paragraphs:
Chris Robinson (singer): Christopher Mark "Chris" Robinson (born December 20, 1966) is an American musician.  He was the singer of the rock and roll band The Black Crowes and brother of its guitarist Rich Robinson.

Getting Away with Murder (song): "Getting Away with Murder" is the first single from the band Papa Roach's third album, "Getting Away with Murder".  The song shows the band's new sound, the sound of the song is hard rock instead of their previous nu metal sound.  The song also features no rapping at all, something that was used in Papa Roach's previous singles.  The video is performance-based, showing the band playing in a Stock Exchange Hall with references filled with fans (including sexual imagery which led the band's lead singer Jacoby Shaddix to describe the video as "stocks and bondage" in an MTV2 interview).  It was directed by Motion Theory.  The song is also the former theme song for "WWE Tough Enough".  It was featured in the video game "MX vs. ATV Unleashed" in 2005.  A "clean" remix of the song called "Getting Away With... (Gran Turismo 4 Vrenna/Walsh Remix)" was featured in "Gran Turismo 4"; it was a bit faster, had the heavily distorted guitars toned down, and had a backing whisper of the words "getting away" instead of ". . with murder".

Lifeline (Papa Roach song): "Lifeline" is the second single from Californian rock band Papa Roach's fifth album, "Metamorphosis", and eleventh released single in total.  The song was originally titled "Hanging On", and was changed to "Lifeline" after lead singer Jacoby Shaddix decided to alter the lyrics of the chorus.  It was released to iTunes on January 27, 2009 and as a Hot Topic exclusive CD single on February 10.  An accompanying music video was released on March 6, 2009.  To launch this song in its truest form, the band filmed "Lifeline" live during "Crüe Fest".

Chris Robinson Brotherhood: Chris Robinson Brotherhood is an American blues rock band formed in 2011 by Black Crowes singer Chris Robinson while The Black Crowes were on hiatus.  The band has released four studio albums: "Big Moon Ritual", "The Magic Door", "Phosphorescent Harvest", and "Any Way You Love, We Know How You Feel".  The band consists of Robinson, guitarist Neal Casal, keyboardist Adam MacDougall, bassist Jeff Hill (who replaced original bassist Mark Dutton in 2016), and drummer Tony Leone (who replaced original drummer George Sluppick in January 2015).

Fight the Sky: Fight the Sky was a post-hardcore band from Sacramento, California, best known for being the heavier side-project of Papa Roach lead singer Jacoby Shaddix.

Getting Away with Murder (album): Getting Away with Murder is the third album by the rock band Papa Roach.  The album was a departure from the band's previous works, showcasing an alternative rock and hard rock sound instead of a nu metal and rap metal sound.  Unlike their previous albums, the album features no rapping and instead features Jacoby Shaddix singing melodies.  It was released on August 31, 2004 via Geffen Records and has been certified Gold in Canada and Platinum in America, selling at least 2.8 million units.  "Getting Away with Murder" peaked at number 17 on the "Billboard" 200.

She Loves Me Not (song): "She Loves Me Not" is the first single from the rock band Papa Roach's second album, "Lovehatetragedy", and fourth released single in total.  Originally written as part of 5 track promo/demo CD funded by Warner Bros.  Records in 1999, "She Loves Me Not" was re-recorded and improved for its new release in 2002.  It was left off their first album, "Infest" (2000), because the band thought the song was too rock-oriented.  The song appeared in the popular soundtrack for the game NHL 2003.  The song is one of the few songs from "Lovehatetragedy" featuring Jacoby Shaddix rapping, a style that the band had less focus on the album which featured more singing and less rapping.

Jacoby Shaddix: Jacoby Dakota Shaddix (born July 28, 1976) is an American musician, singer-songwriter, sporadic actor and former television presenter.  He is best known as being the founding member and the continuous lead singer of the California-based rock band Papa Roach since the band's formation in 1993.

Still Swingin': Still Swingin' is a song by the American rock band Papa Roach released as the first single from their album "The Connection" on June 24, 2012.  The single was well received by the fans for the return of the rap-style vocals of the band's early work.  The track was produced by Tylias, an indie dubstep and hip-hop producer from the underground of the music scene.  The embrace of this aggregate had polarized opinions, some calling it new and fresh to the songs and another calling it an aberration of their style and even the band, but mostly it was well received.  On August 30, they released a music video while lead singer Jacoby Shaddix recovers from a vocal surgery.

After Hours (Glamour of the Kill EP): Funded via Kickstarter after the band parted ways with their management and record company, the album will be released on November 17, 2014, through Siege of Amida Records.  The single "Out of Control" (featuring Jacoby Shaddix of Papa Roach) was released on October 5, 2014, and was premiered on BBC Radio 1 Rock Show.  Two weeks later, they announced pre-orders for the album.

Supporting paragraphs: Jacoby Shaddix Chris Robinson (singer)
Answer: American