Squid are cephalopods of the order Teuthida, which comprises around 300 species. Like all other cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid, like cuttlefish, have eight arms arranged in pairs and two, usually longer, tentacles. Squid are strong swimmers and certain species can 'fly' for short distances out of the water.

Squid have differentiated from their ancestral molluscs such that the body plan has been condensed antero-posteriorly and extended dorso-ventrally. What before may have been the foot of the ancestor is modified into a complex set of tentacles and highly developed sense organs, including advanced eyes similar to those of vertebrates.

The ancestral shell has been lost, with only an internal gladius, or pen, remaining. The pen is a feather-shaped internal structure that supports the squid's mantle and serves as a site for muscle attachment. It is made of a chitin-like material.

The main body mass is enclosed in the mantle, which has a swimming fin along each side. These fins, unlike in other marine organisms, are not the main source of locomotion in most species.

Amy Lynn Hartzler (née Lee; born December 13, 1981), known professionally as Amy Lee, is an American singer-songwriter and classically trained pianist. She is co-founder and lead vocalist of the rock band Evanescence. She cites influences ranging from classical musicians such as Mozart to modern artists Björk, Tori Amos, Danny Elfman and Plumb. Along with her contributions to Evanescence, Lee has also participated on numerous other musical projects including Walt Disney Records' 2008 release of The Nightmare Before Christmas soundtrack. Lee has performed collaborations with artists such as Korn, Seether, and David Hodges. Lee is also the American chairperson for the international epilepsy awareness foundation, Out of the Shadows.Revolver Magazine named Lee the #1 Hottest Chick in Hard Rock for their 2011 annual issue and she appeared on the front cover.

Amy Lee was born to parents John Lee, a disc jockey and TV personality, and Sara Cargill. She has a brother named Robby and two sisters, Carrie and Lori. Lee had a younger sister who died in 1987 at the age of three from an unidentified illness. The song "Hello" from Fallen has been reported to have been written for her late sister, as well as the song "Like You" from The Open Door. Lee took classical piano lessons for nine years. Her family moved to many places, including Florida and Illinois, and eventually settled in Little Rock, Arkansas, where Evanescence started. She briefly attended Middle Tennessee State University to study music theory and composition and later dropped out to focus on Evanescence.

The Walls are an Irish rock band. They were formed in 1998 by two ex-members of The Stunning.

Brothers Steve and Joe Wall (previously of The Stunning) returned to Ireland after a two-year failed label stint in London. Their Camden housemate Carl Harms joined the band on guitar and keyboard duties. Drummer Rory Doyle joined soon afterwards. They set up their own label, Earshot Records (later changing it to Dirtbird Records) and recorded and released a string of singles. A remix of one of the album tracks, "Bone Deep", clicked with radio and became a nationwide hit. Many of the songs have featured on a number of TV series and feature films such as Bachelors Walk, Dead Bodies, Goldfish Memory and On the Edge (starring Cillian Murphy).

The Walls heard rumour of a second Slane Castle date for U2 (as the first concert had sold out in hours). They sent four copies of their album to the band. Bono loved it and offered The Walls a support slot. That day the band played to their biggest crowd to date – around 80,000 people. "To the Bright and Shining Sun" was their next single. That June they supported Red Hot Chili Peppers. They spent the next year gigging while building their own studio in Dublin.