Question: Who is the American drummer/singer best known as a member of Mastodon, but has also played drums with Fred Armisen with the 8G Band?

<P0-S0> Brann Timothy Dailor (born March 19, 1975 in Rochester, NY) is an American drummer/singer best known as a member of the Atlanta, Georgia metal band Mastodon, in which he is both the drummer and shares vocal duties. <P0-S1>  Dailor first started playing in a band called Evisceration from 1991 to 1993, when the band broke up. <P0-S2>  Dailor was also a founding member of mathcore band Lethargy, and the progressive dreamfunk band Gaylord and played with Today Is the Day. <SEP> <P1-S0> The 8G Band is the house band for "Late Night with Seth Meyers". <P1-S1>  The band is led by "Saturday Night Live" alumnus Fred Armisen. <P1-S2>  He assembled the 8G Band, named for the studio where the show is taped, just two weeks before the test show. <P1-S3>  He texted friends Seth Jabour, Syd Butler and Eli Janney ("What are you guys doing this week?") <P1-S4> , then found first drummer Kimberly Thompson through an audition. <P1-S5>  Guitarist Marnie Stern later joined as well. <P1-S6>  After Thompson left the band, guest musicians frequently sit in often for an entire week. <P1-S7>  Some notable names to sit in on the drum kit include: Patrick Carney, Chad Smith, David Lovering, Kenny Aronoff, Jon Theodore, Nicko McBrain, Matt Sorum, Brad Wilk, Darren King, Danny Carey, Abe Cunningham, Dave Lombardo, Brann Dailor, Jimmy Chamberlin, Matt Cameron, and Abe Laboriel Jr. as well as other guest musicians. <P1-S8>  Additionally singer, guitarist: J Mascis, Bob Mould and others have also sat in with the band. <SEP> <P2-S0> Fereydun Robert "Fred" Armisen (born December 4, 1966) is an American actor, comedian, voice artist, screenwriter, producer, singer, and musician. <P2-S1>  Widely known as a cast member on "Saturday Night Live" from 2002 until 2013, Armisen has portrayed characters in comedy films, including "EuroTrip", "", and "Cop Out". <P2-S2>  With his comedy partner Carrie Brownstein, Armisen is the co-creator and co-star of the IFC sketch comedy series "Portlandia". <P2-S3>  Armisen founded ThunderAnt.com, a website that features the comedy sketches created with Brownstein, and is the bandleader for the "Late Night with Seth Meyers" house band, The 8G Band. <SEP> <P3-S0> Kevin Daniel Kelley (March 25, 1943 – April 6, 2002) was an American drummer, best known for his work with the rock bands The Byrds and the Rising Sons. <P3-S1>  Kelley also played drums for Fever Tree, although it is unknown whether he was an official member of the group or not. <P3-S2>  In addition, he worked as a session musician between 1969 and 1973, playing drums on albums by artists including John Fahey and Phil Ochs. <P3-S3>  He appears to have retired from the music industry after drumming on Michael Cohen's 1973 album, "What Did You Expect?" <P3-S4>  Kelley is the cousin of country rock pioneer and ex-member of The Byrds and The Flying Burrito Brothers, Chris Hillman. <P3-S5>  Kevin Kelley should not be confused with the similarly named Kevin Kelly, another American session musician who played piano for Joan Baez during the Rolling Thunder Revue and guested on albums by Tim Buckley, Judee Sill, Bryn Haworth, and The Babys during the 1970s.