Answer the question at the end by quoting:

The Nitty Gritty Dirt Band, an American country rock band, has existed in various forms since its founding in Long Beach, California in 1966. The group's membership has had at least a dozen changes over the years, including a period from 1976 to 1981 when the band performed and recorded as the Dirt Band. Constant members since the early times are singer-guitarist Jeff Hanna and drummer Jimmie Fadden. Multi-instrumentalist John McEuen was with the band from 1966 to 1986 and returned during 2001 departing once again in November 2017.
The Nitty Gritty Dirt Band was founded around 1966 in Long Beach, California by singer-guitarist Jeff Hanna and singer-songwriter guitarist Bruce Kunkel who had performed as the New Coast Two and later the Illegitimate Jug Band. Trying, in the words of the band's website, to "figure out how not to have to work for a living," Hanna and Kunkel joined informal jam sessions at McCabe's Guitar Shop in Long Beach. There they met a few other musicians: guitarist/washtub bassist Ralph Barr, guitarist-clarinetist Les Thompson, harmonicist and jug player Jimmie Fadden, and guitarist-vocalist Jackson Browne. As Nitty Gritty Dirt Band, the six men started as a jug band and adopted the burgeoning southern California folk rock musical style, playing in local clubs while wearing pinstripe suits and cowboy boots. Their first paying performance was at the Golden Bear in Huntington Beach, California.  Browne was in the band for only a few months before he left to concentrate on a solo career as a singer-songwriter. He was replaced by John McEuen on banjo, fiddle, mandolin, and steel guitar. McEuen's older brother, William, was the group's manager, and he helped the band get signed with Liberty Records, which released the group's debut album, The Nitty Gritty Dirt Band during 1967. The band's first single, "Buy for Me the Rain," was a Top 40 success, and the band gained exposure on The Tonight Show Starring Johnny Carson, as well as concerts with such disparate artists as Jack Benny and The Doors.  A second album, Ricochet, was released later during the year and was less successful than their first. Kunkel wanted the band to "go electric", and include more original material. Bruce left the group to form WordSalad and Of The People. He was replaced by multi-instrumentalist Chris Darrow.  By 1968, the band adopted electrical instruments anyway, and added drums. The first electric album, Rare Junk, was a commercial failure, as was their next, Alive.  The band continued to gain publicity, mainly as a novelty act, making an appearance in the 1968 film, For Singles Only, and a cameo appearance in the 1969 musical western film, Paint Your Wagon, performing "Hand Me Down That Can o' Beans". The band also played Carnegie Hall as an opening act for Bill Cosby and played in a jam session with Dizzy Gillespie.

Did they perform on the Tonight show?

gained exposure on The Tonight Show Starring Johnny Carson,

IN: Rouvas was born on 5 January 1972 in the village of Mandoukion, near Corfu City on the island of Corfu, the eldest of four sons of Konstantinos "Kostas" Rouvas (an ambulance driver) and the teenaged Anna-Maria Panaretou (a duty-free shop clerk at the local airport). He has three brothers: Billy (b. Vasilios), Tolis (b. Apostolos, 1975) and Nikos (b. Nikolaos, 1991). The family was poor, and Rouvas began taking care of his brothers at age five. At age four, he exhibited athletic ability and took ballet classes as a child.

After moving to Patras, Rouvas continued to look for performance opportunities until he met Dakis (a popular Greek artist who was the first person to help him professionally). Rouvas moved to Athens, and made his first professional appearance in 1991 at the Show Centre. His showmanship attracted the attention of music executives such as Nikos Mouratidis, who encouraged songwriter Giorgos Pavrianos to produce him. Rouvas, singing Michael Jackson's "Man in the Mirror" was discovered by PolyGram executives who signed him to his first recording contract. After moving to Athens he lived with an older English woman named Sally, with whom he had begun a relationship on Corfu. Their relationship ended when Psinakis became Rouvas' manager, and the singer became more career-oriented. The media has speculated about Rouvas' personal life and relationships with model Zeta Logotheti, Sofi Kantarou (a Corfu bar manager) and singer Elli Kokkinou. Several months later he debuted at the Thessaloniki Song Festival, losing Best Vocal Performance to Giorgos Alkaios but singing the Best Composition ("Par'ta"; "Take Them", with music by Nikos Terzis and lyrics by Giorgos Pavrianos). There was a brief earthquake during the festival.  Rouvas released his eponymous debut album, which topped the Greek Albums Chart, the day after the festival. "Par'ta" became a radio hit, and other songs of the album such as "1992", "Ego S'agapo" ("I Love You") and "Gia Fantasou" ("Imagine") also became popular.  In September 1992 Rouvas released his second album, Min Andistekese (Don't Resist), also composed by Nikos Terzis. It produced the singles "Gyrna" ("Return"), "Min Andistekese", "Na Ziseis Moro Mou" ("Live, My Baby") and "Me Kommeni Tin Anasa" ("Breathless"), with a music video of the title track. The album's success helped establish Rouvas at the top of the Greek music scene.  In October 1993 Rouvas released his third album, Gia Sena (For You), with music by Alexis Papadimitriou and lyrics by Eleni Giannatsoulia and Evi Droutsa. The single "Kane Me" ("Make Me") became a radio hit, with "To Xero Eisai Moni" ("I Know You Are Alone") and "Xehase To" ("Forget It") also receiving airplay.

What kinds of performing did he do besides singing?

OUT: