A chain is a series of connected links which are typically made of metal. A chain may consist of two or more links.

Chains are usually made in one of two styles, according to their intended use:

Two distinct chains can be connected using a quick link which resembles a carabiner with a screw close rather than a latch.

Uses for chain include:

According to the "Complete Guide to Chain", the metal link chain was invented in 225 BC.

Nicholas Jerry "Nick" Jonas (born September 16, 1992) is an American singer-songwriter, musician and actor best known as one of the Jonas Brothers, a pop-rock band he formed with his brothers Joe and Kevin. The Jonas Brothers originally started as an attempted solo singing career for Nick, but the record producer liked the sound when his brothers sang backup for him. He previously starred in the Disney Channel original series JONAS L.A. as Nick Lucas, alongside his brothers. He also starred in the Disney Channel original movie Camp Rock and Camp Rock 2: The Final Jam. He formed the band Nick Jonas & The Administration, which released its first album in 2010.

Jonas's career started when he was discovered at the age of six in a barber shop, while his mother was getting her hair cut and was referred to a professional show business manager. At the age of 7, he began performing on Broadway. He had acted in several plays, including A Christmas Carol (in 2000 as Tiny Tim and Scrooge at eight), Annie Get Your Gun (in 2001 as Little Jake), Beauty and the Beast (in 2002 as Chip), and Les Misérables (in 2003 as Gavroche). After Les Misérables closed, he performed in The Sound of Music (as Kurt) at the Paper Mill Playhouse.

Tina Arena (born Filippina Lydia Arena; 1 November 1967) is an Australian singer, songwriter and musical theatre actress. She has won several awards, most notably 6 ARIA Awards and in both 1996 and 2000 she received the World Music Award for the world's best selling Australian artist. She has sold over eight million records worldwide to date. Tina has accepted the position of judge on the 2011 reboot of Young Talent Time in Australia. The original 1977 series made her a household name.

Arena was born to Italian immigrants, Giuseppe and Franca Arena, living in the Melbourne suburb of East Keilor, Victoria. She has two sisters, Nancy and Silvana. Her family calls her Pina which evolved into her stage name, Tina. Arena attended St. Columba's College, Melbourne, in Essendon, from 1980 and graduated in 1985.

Arena began her career as a 7-year-old, singing live on the variety television show Young Talent Time. Even as a young girl she was known for her powerful voice and stage presence, but she dropped from sight for several years following her Young Talent Time tenure, working the club circuit alone and in bands and also appearing in musicals.