1 (one;  /ˈwʌn/ or UK /ˈwɒn/) is a number, a numeral, and the name of the glyph representing that number. It represents a single entity, the unit of counting or measurement. For example, a line segment of "unit length" is a line segment of length 1.

One, sometimes referred to as unity, is the integer before two and after zero. One is the first non-zero number in the natural numbers as well as the first odd number in the natural numbers.

Any number multiplied by one is the number, as one is the identity for multiplication. As a result, one is its own factorial, its own square, its own cube, and so on. One is also the empty product, as any number multiplied by one is itself, which produces the same result as multiplying by no numbers at all.

The glyph used today in the Western world to represent the number 1, a vertical line, often with a serif at the top and sometimes a short horizontal line at the bottom, traces its roots back to the Indians, who wrote 1 as a horizontal line, much like the Chinese character 一. The Gupta wrote it as a curved line, and the Nagari sometimes added a small circle on the left (rotated a quarter turn to the right, this 9-look-alike became the present day numeral 1 in the Gujarati and Punjabi scripts). The Nepali also rotated it to the right but kept the circle small. This eventually became the top serif in the modern numeral, but the occasional short horizontal line at the bottom probably originates from similarity with the Roman numeral Failed to parse (Missing texvc executable; please see math/README to configure.): \mathrm{I} . In some European countries (e.g., Germany), the little serif at the top is sometimes extended into a long upstroke, sometimes as long as the vertical line, which can lead to confusion with the glyph for seven in other countries. Where the 1 is written with a long upstroke, the number 7 has a horizontal stroke through the vertical line.

Kobe Bean Bryant (born August 23, 1978) is an American professional basketball player who plays shooting guard for the Los Angeles Lakers of the National Basketball Association (NBA). Bryant enjoyed a successful high school basketball career at Lower Merion High School, where he was recognized as the top high school basketball player in the country. He decided to declare his eligibility for the NBA Draft upon graduation, and was selected with the 13th overall pick in the 1996 NBA Draft by the Charlotte Hornets, then traded to the Los Angeles Lakers. As a rookie, Bryant earned himself a reputation as a high-flyer and a fan favorite by winning the 1997 Slam Dunk Contest.

Bryant and Shaquille O'Neal led the Lakers to three consecutive NBA championships from 2000 to 2002. A heated feud between the duo and a loss in the 2004 NBA Finals was followed by O'Neal's trade from the Lakers after the 2003–04 season. Following O'Neal's departure Bryant became the cornerstone of the Los Angeles Lakers franchise. He led the NBA in scoring during the 2005–06 and 2006–07 seasons, setting numerous scoring records in the process. In 2006, Bryant scored a career-high 81 points against the Toronto Raptors, the second most points scored in a single game in NBA history, second only to Wilt Chamberlain's 100-point game in 1962. He was awarded the regular season's Most Valuable Player Award (MVP) in 2008. After losing in the 2008 NBA Finals, Bryant led the Lakers to two consecutive championships in 2009 and 2010, earning the NBA Finals MVP Award on both occasions.

Alicia Augello Cook (born January 25, 1981), better known by her stage name Alicia Keys, is an American R&B singer-songwriter, record producer, and actress. Keys was raised by a single mother in the Hell's Kitchen area of Manhattan in New York City. At age seven, Keys began playing the piano. She attended Professional Performing Arts School and graduated at 16 as valedictorian. Keys released her debut album with J Records, having had previous record deals first with Columbia and then Arista Records.

Keys' debut album, Songs in A Minor, was a commercial success, selling over 12 million copies worldwide. She became the best-selling new artist and best-selling R&B artist of 2001. The album earned Keys five Grammy Awards in 2002, including Best New Artist and Song of the Year for "Fallin'". Her second studio album, The Diary of Alicia Keys, was released in 2003 and was also another success worldwide, selling eight million copies. The album garnered her an additional four Grammy Awards in 2005. Later that year, she released her first live album, Unplugged, which debuted at number one in the United States. She became the first female to have an MTV Unplugged album to debut at number one and the highest since Nirvana in 1994.