Invisibility is the state of an object that cannot be seen. An object in this state is said to be invisible (literally, "not visible"). The term is usually used as a fantasy/science fiction term, where objects are literally made unseeable by magical or technological means; however, its effects can also be seen in the real world, particularly in physics and perceptional psychology.

Since objects can be seen by light in the visible spectrum from a source reflecting off their surfaces and hitting the viewer's eye, the most natural form of invisibility (whether real or fictional) is an object that neither reflects nor absorbs light (that is, it allows light to pass through it). In nature, this is known as transparency, and is seen in many naturally occurring materials (although no naturally occurring material is 100% transparent).

Visibility also depends on the eyes of the observer and/or the instruments used. Thus an object can be classified as "invisible to" a person, animal, instrument, etc. In the research of sensorial perception invisibility has been shown to happen in cycles.

Hunter Easton Hayes (born September 9, 1991) is an American country music singer and songwriter. He is signed to Atlantic Records Nashville, which released his debut single "Storm Warning" on May 16, 2011. His self titled album was released on October 11, 2011.

Hayes was born on September 9, 1991 in Breaux Bridge, Louisiana to Lynette and Leo Hayes. He began his musical career at age two when his grandmother gave him a toy accordion. At age four, he began making appearances at local performances and on national television, including showings on Maury, Rosie O'Donnell, and Nickelodeon's series Figure It Out. At the age of 13, Hayes appeared on "America's Most Talented Kids," a show hosted by Dave Coulier. He performed the hit Hank Williams song, "Hey Good Lookin'."

In 2008, he moved from his hometown of Breaux Bridge, Louisiana to Nashville, Tennessee to be signed with Universal Music Publishing Group as a songwriter. He graduated in 2007, at the age of 16, and in 2010, co-wrote "Play" for the Rascal Flatts album Nothing Like This. In September 2010, Hayes was signed to Atlantic Records Nashville and released his debut single "Storm Warning" on May 16, 2011. It was the first single from his debut album, on which Hayes played every instrument and co-produced with Dann Huff. Matt Bjorke of Roughstock gave the single three stars out of five, praising the lyrics and comparing Hayes' voice favorably to Rascal Flatts' lead singer Gary LeVox, with whom Hayes toured from January to February 2012 on the Rascal Flatts "Thaw Out" tour. Hayes' debut, self-titled album, Hunter Hayes was released on October 11, 2011.

Holly Brook Hafermann (born February 23, 1986) better known by her stage name Skylar Grey, is an five-time Grammy-nominated American multi-instrumentalist, singer, songwriter, and record producer. Grey was signed to Machine Shop Recordings under the name Holly Brook. She released her debut album as Holly Brook, Like Blood Like Honey, in 2006. She co-wrote the three versions of "Love the Way You Lie" (for Eminem and Rihanna) with Alex da Kid, who signed her to his Wonderland Music label. She was featured as a guest vocalist on Fort Minor's "Where'd You Go" and "Be Somebody", Diddy-Dirty Money's "Coming Home", Dr. Dre's "I Need a Doctor", Lupe Fiasco's "Words I Never Said" and Kaskade's "Room for Happiness".

Grey performed professionally as a child in a folk duo with her mother called Generations. Together, (with producer/engineer Randy Green) they independently produced three albums, Dream Maker, Lift Me, and Millennial Child/Waiting For You. Grey started her first band at the age of fifteen after 'sneaking' into bars, working with jazz musicians including Jeff Eckles, Tim Whalen and Leo Sidran in Madison, Wisconsin.

Alison Moyet (born Geneviève Alison Jane Moyet 18 June 1961, Billericay) is an English singer, songwriter and performer noted for her bluesy voice.

Her UK album sales have reached a certified 2.3 million, with over a million singles sold, All seven of her studio albums and three compilation albums have charted in the Top 30 UK Album Chart, with two of the albums reaching number one. She has also achieved nine Top 30 singles and five Top 10 hits in the UK Singles Chart.

Geneviève Alison Jane Moyet was born in the small Essex town of Billericay to a French father and English mother. She grew up in the nearby town of Basildon, where she attended Markhams Chase Junior School. Upon leaving school at 16, she worked as a shop assistant and trained as a piano tuner. She was involved in a number of punk rock, pub rock and blues bands in the South East Essex area during the late 1970s and early 1980s, including the Vandals, the Screamin' Ab Dabs, the Vicars and the Little Roosters (the latter featuring Gary Lammin formerly of Cock Sparrer).

Geoffrey Royce Rojas (born May 11, 1989), known professionally as Prince Royce, is an American singer-songwriter and record producer from New York City, New York. At an early age, Royce took an interest in music and into his teenage years, began experimenting with music and writing poetry. By age nineteen, Royce met Andrés Hidalgo, who became his manager. Hidalgo later introduced Royce to Sergio George, who immediately signed him to his label after hearing three of his demos.

In March 2010, he released his eponymous debut studio album, which generated two commercially successful singles, "Stand by Me" and "Corazón Sin Cara". Both songs reached number-one on the Billboard Tropical Songs chart while "Corazón Sin Cara" reached number-one the US Hot Latin Songs chart. The album, itself, was a commercial success, reaching number-one on the US Billboard Latin Albums and Tropical Albums charts. The album earned Royce three awards at the Premio Lo Nuestro Awards, including Tropical Male Artist of the Year. He also received three more at the Billboard Latin Music Awards in 2011, which included Tropical Album of the Year for Prince Royce.