A joint is the location at which two or more bones make contact. They are constructed to allow movement (except for skull bones) and provide mechanical support, and are classified structurally and functionally.

Joints are mainly classified structurally and functionally. Structural classification is determined by how the bones connect to each other, while functional classification is determined by the degree of movement between the articulating bones. In practice, there is significant overlap between the two types of classifications.

Terms ending in the suffix -sis are singular and refer to just one joint, while -ses is the suffix for pluralization.

Structural classification names and divides joints according to how the bones are connected to each other. There are three structural classifications of joints:

Joints can also be classified functionally, by the degree of mobility they allow:

Joints can also be classified based on their anatomy or on their biomechanical properties. According to the anatomic classification, joints are subdivided into simple and compound, depending on the number of bones involved, and into complex and combination joints:

Cameron Jibril Thomaz (born September 8, 1987), better known by the stage name Wiz Khalifa, is an American rapper. He released his debut album, Show and Prove, in 2006, and signed to Warner Bros. Records in 2007. His Eurodance-influenced single, "Say Yeah", received urban radio airplay, charting on the Rhythmic Top 40 and Hot Rap Tracks charts in 2008. Khalifa parted with Warner Bros. and released his second album, Deal or No Deal, in November 2009. He released the mixtape Kush and Orange Juice as a free download in April 2010; he then signed with Atlantic Records. He is also well known for his debut single for Atlantic, "Black and Yellow", which peaked at number 1 on the Billboard Hot 100. His debut album for the label, Rolling Papers, was released on March 29, 2011.

Khalifa was born on September 8, 1987 to a mother and a father serving in the military. His parents divorced when Khalifa was about three years old. His parents' military service caused him to move regularly: Khalifa lived in Germany, the United Kingdom, and Japan before settling in Pittsburgh where he attended Taylor Allderdice High School.

Miley Ray Cyrus (born Destiny Hope Cyrus; November 23, 1992) is an American actress and pop singer-songwriter. She achieved wide fame for her role as Miley Stewart/Hannah Montana on the Disney Channel sitcom Hannah Montana.

Cyrus recorded music for the soundtracks, Hannah Montana (2006) and Hannah Montana 2/Meet Miley Cyrus (2007), released by Walt Disney Records. With the success of the Hannah Montana franchise she established herself as a teen idol. In 2007, Cyrus signed to Hollywood Records to pursue a solo career. She embarked upon the Best of Both Worlds Tour the same year, in which she performed as both herself and in character as Hannah Montana. The tour was eventually turned into a high-grossing concert film titled Hannah Montana & Miley Cyrus: Best of Both Worlds Concert (2008). In July 2008, Cyrus released her first solo album, Breakout (2008), which was commercially successful.

She began her foray into film by providing the voice of "Penny" in the animated film Bolt (2008). Cyrus earned a nomination for the Golden Globe Award for Best Original Song for her performance of Bolt's theme song, "I Thought I Lost You". She also reprised her role as Miley Stewart/Hannah Montana in Hannah Montana: The Movie (2009). The Hannah Montana: The Movie' soundtrack introduced her to new audiences within country and adult contemporary markets.

Mami Kawada (川田まみ, Kawada Mami^?, born February 13) is a Japanese pop singer from Sapporo, Japan who is currently signed to Geneon Entertainment. She is a member of the I've Sound who performs soundtracks for eroge games and anime. Some of her music was used as the opening or ending themes for anime series such as Please Teacher!, Please Twins!, Starship Operators, Shakugan no Shana, Baldr Force EXE Resolution OVA and Hayate the Combat Butler. Her debut single "Radiance", released on February 23, 2005, was used as the opening theme for the anime Starship Operators. Her most successful single was "Joint," released on October 31, 2007, and used as the first opening theme for the sequel of Shakugan no Shana, Shakugan no Shana II.

Mami Kawada's vocal talent was first discovered by Eiko Shimamiya, who was her teacher at a vocal school in Sapporo, Hokkaido. She was introduced to I've Sound, a music production group whom Shimamiya was a member of. Kawada would later become a member of I've Sound. In 2001, she released her debut song with I've Sound was "Kaze to Kimi wo Daite" (風と君を抱いて^?), which was the opening theme for the eroge miss you. The song was featured in the I've Sound's 5th Compilation Album Out Flow.