Question: Mindless Self Indulgence and Tappi Tíkarrass are both what?

Context articles: How I Learned to Stop Giving a Shit and Love Mindless Self Indulgence
Alienating Our Audience
On It
Jimmy Urine
Mindless Self Indulgence
The Left Rights (album)
Liar (Fake Shark – Real Zombie! album)
Enemymine
Rob Kleiner
Tappi Tíkarrass

How I Learned to Stop Giving a Shit and Love Mindless Self Indulgence
Alienating Our Audience is a live album by the band Mindless Self Indulgence, released on October 8, 2002 (see 2002 in music).
 The album contains many fan favorites from the "Tight" era, as well as six previously unreleased tracks.
 The recordings took place throughout the band's tour with System of a Down (February 14-March 1), but mostly pulled material from two shows: May 13 at CBGB's in New York City, NY and May 15 at The Whiskey A-Go-Go in Los Angeles, CA.
"On It" is a single by American electropunk band Mindless Self Indulgence, released in the U.S. on July 8, 2008.
 The single reached number 2 on the "Billboard" Hot 100 Singles Sales chart.
James Euringer (born September 7, 1969), known professionally as Jimmy Urine, is an American singer, songwriter, and musician.
 He is best known as the lead singer and programmer of electropunk band Mindless Self Indulgence.
Mindless Self Indulgence (often shortened to MSI) is an American electropunk band formed in New York City in 1997.
 Their music has a mixed style which includes punk rock, alternative rock, electronica, techno, industrial, hip hop and breakbeat hardcore.
 Their group name is derived from an Ayn Rand quote found in the book "Atlas Shrugged".
The Left Rights is the self-titled debut album by the Mindless Self Indulgence side project featuring members Little Jimmy Urine and Steve, Righ?
.
 The album also contains a video of Mindless Self Indulgence performing "Panty Shot" live at CBGBs in New York City.
Liar is the third album by Vancouver indie band Fake Shark – Real Zombie!
.
 It was released on February 14, 2013.
 The album is a bit of direction change for the band, and the first with label, Light Organ Records.
 Guests include Care Failure of the band Die Mannequin, Jimmy Urine of Mindless Self Indulgence, Steve Bays of Hot Hot Heat, and Henry Rollins.
Enemymine was a Washington-state-based indie rock band known for their very loud and abrasive music.
 The band consisted of three members; two bass guitarists and a drummer.
 Mike Kunka of godheadSilo played bass and provided vocals on all songs, while Zak Sally from Low also played bass and Danny Sasaki played drums.
 Ryan Baldoz also played bass.
 Enemymine has played shows with Jucifer, Melvins, Mindless Self Indulgence, Burning Brides, the Rapture, Melt Banana, among others.
Rob Kleiner is an American songwriter and producer.
 Kleiner received degrees in music composition and philosophy at Eastern Illinois University.
 He would later go on to direct and score the film Andalusian Doug: Academic Freedom vs. Religious Conservatism, a documentary about the controversial teaching methods of his music professor, Douglas DiBianco.
 Between 1997 and 2011 he was a touring member of Tub Ring, Super 8-Bit Brothers, and occasional fill-in for Mindless Self Indulgence.
Tappi Tíkarrass was an Icelandic punk band which added elements of funk, rock and jazz to their music, marking a difference from other traditional bands at that time.
 The band is also considered the first serious music project of now renowned singer Björk Guðmundsdóttir.