The Top Forty or Top 40 is a music industry shorthand for the currently most-popular songs in a particular genre. When used without qualification, it typically refers to the best-selling or most frequently broadcast popular music songs of the previous week. Top 40 became the dominant radio format of the 1960s, 1970s, and 1980s.

The term "Top 40" for a radio format appeared in 1951.

The Top 40, or top forty, whether surveyed by a radio station or a publication, was a list of songs that shared only the common characteristic of being newly released. Its popularity coincided with the rapid changes in recording technology in the 1950s and 1960s. In 1954, the recording industry agreed upon a standard recording format for higher fidelity music, so any new record player could play any new record. Also in that year, new single records were released on 45 rpm records, and the Top 40 thereafter became a survey of the popularity of these records (and their airplay on the radio). Tape recording had become perfected, allowing artists more freedom as they composed songs, especially novelty songs.

A top (also called spinning top or spintop) is a toy that can be spun on an axis, balancing on a point. This motion is produced in the most simple forms of top by twirling the stem using the fingers. More sophisticated tops are spun by holding the axis firmly while pulling a string or twisting a stick or pushing an auger as shown in the pictures on this page. In the kinds with an auger, an internal weight rotates, producing an overall circular motion.

The top is one of the oldest recognizable toys found on archaeological sites. Spinning tops originated independently in cultures all over the world. Besides toys, tops have also historically been used for gambling and prophecy. Some role-playing gamers still use tops to augment dice in generating randomized results; it is in this case referred to as a spinner.^{[citation needed]} A thumbtack may also be made to spin on the same principles.

The action of a top relies on the gyroscopic effect for its operation. Typically the top will at first wobble until the shape of the tip and its interaction with the surface force it upright. After spinning upright for an extended period, the angular momentum, and therefore the gyroscopic effect will gradually lessen, leading to ever increasing precession, finally causing the top to topple in a frequently violent last thrash.

Vincent Lamar "Vince" Carter (born January 26, 1977) is an American professional basketball player with the Dallas Mavericks. He is a shooting guard who can also play small forward.

A high school McDonald's All-American, Carter played three years at the University of North Carolina, where he twice reached the Final Four of the NCAA Tournament before being selected as the fifth overall pick in the 1998 NBA Draft by the Golden State Warriors, who traded him to the Toronto Raptors. He won the 1999 NBA Rookie of the Year Award and won the Slam Dunk Contest at the 2000 NBA All-Star Game the following season. That summer, he represented the United States in the Summer Olympics, winning a gold medal.

He quickly emerged as a league star, entertaining crowds with his leaping ability and slam dunks, earning him nicknames such as "Vinsanity," "Air Canada," and "Half-Man, Half-Amazing."

He led the Raptors to their first three playoff appearances. In 2004, he was traded to the New Jersey Nets, and he helped lead them to three playoff berths. In July 2009, Carter was traded to the Orlando Magic, helping them to advance to the Eastern Conference finals before being traded to the Phoenix Suns in December, 2010.

Tyler Ray Ward (born March 12, 1989), is a singer/songwriter and producer known for his covers of hit songs by artists including Adele, Maroon 5, Justin Bieber, and Katy Perry. Tyler is also well known for his original songs such as Everything, The Hardest Thing, The Rescue, Paper Heart and Our Story's Told. Although Ward often sings and produces his own music, he also works with his backing band on many projects and on tour, members include his instrumental band whom he met during a small gig in 2007 along with rapper Eppic, singer/songwriter Alex G and rapper and brother Derek Ward... He has also worked and produced music for many people across Youtube including Boyce Avenue, Megan Nicole and Katy McAllister..

Tyler Ward is best known for his cover with fellow YouTubers, Megan Nicole and Eppic of Eminem's "Love the Way You Lie" which has had more than 17 million views as of July 1, 2012. His first video was a mix of the current top 40 songs of 2008 which has 600 thousand views to date. Since then, Ward has amassed over 900,000 subscribers and more than 250 million views on his channel.

DeAndre Cortez Way (born July 28, 1990), better known by his stage name Soulja Boy Tell 'Em, or simply Soulja Boy, is an American rapper, record producer, actor, and entrepreneur.

In September 2007, his single "Crank That (Soulja Boy)" reached number one on the Billboard Hot 100. The single was initially self-published on the internet, and it later became a number-one hit in the United States for seven non-consecutive weeks starting in September 2007. On August 17 Way was listed at #18 on the Forbes list of Hip-Hop Cash Kings of 2010 earning $7 million for that year.

Way has currently released three studio albums and one independent album: his debut studio album Souljaboytellem.com (2007) was certified platinum by the RIAA. However, his next two albums, iSouljaBoyTellem (2008) and The DeAndre Way (2010) did not match the commercial success of his debut, the latter only selling 100,000 copies, despite the success of several singles across both albums, such as "Kiss Me Thru the Phone" and "Turn My Swag On" (iSouljaBoyTellem) and "Pretty Boy Swag" (The DeAndre Way).