Question:  What annual event occurs on a property co-founded by an American who was the best-selling recording artist of the 20th century?

The Del Mar Fairgrounds is a 370 acre property that is the site of the annual San Diego County Fair (called the Del Mar Fair from 1984 to 2001).  Its Del Mar racetrack was built by the Thoroughbred Club in 1937 by founding members Bing Crosby and Pat O'Brien with Paramount Studios as corporate sponsor. <SEP> Harry Lillis "Bing" Crosby Jr. ( ; May 3, 1903 – October 14, 1977) was an American singer and actor.  Crosby's trademark warm bass-baritone voice made him the best-selling recording artist of the 20th century, having sold over one billion records, tapes, compact discs and digital downloads around the world. <SEP> The World Series, the modern championship series of Major League Baseball, began in 1903, and was established as an annual event in 1905.  Before the formation of the American Association (AA), there were no playoff rounds—all championships went to the team with the best record at the end of the season.  In the initial season of the National League (NL) in 1876, there was controversy as to which team was the champion: the Chicago White Stockings, who had the best overall record (52–14), or the St. Louis Brown Stockings (45–19), who were the only team to have a winning record against every other franchise in the league.  The teams agreed to play a five-game "Championship of the West" series, won by St. Louis, 4 games to 1.  Beginning in 1884, the championship series between the National League and the American Association were promoted and referred to as the "World's Championship Series" (WCS), or "World's Series" for short; however, they are not officially recognized by Major League Baseball as part of World Series history.  Though early publications, such as Ernest Lanigan's "Baseball Cyclopedia" and Turkin and Thompson's "Encyclopedia of Baseball", listed the 19th-century games on an equal basis with those of the 20th century, "Sporting News" publications about the World Series, which began in the 1920s, ignored the 19th-century games, as did most publications about the Series after 1960.  Major League Baseball, in general, regards 19th-century events as a prologue to the modern era of baseball, which is defined by the emergence of the two present major leagues. <SEP> Mariah Carey (born March 27, 1969 or 1970) is an American singer, songwriter, record producer, and actress.  In 1990, she rose to fame with the release of "Vision of Love" from her eponymous debut album.  The album produced four chart-topping singles in the US and began what would become a string of commercially successful albums which solidified the singer as Columbia Records' highest selling act.  Carey and Boyz II Men spent a record sixteen weeks atop the "Billboard" Hot 100 in 1995–1996 with "One Sweet Day," which remains the longest-running number-one song in US chart history.  Following a contentious divorce from Sony Music head Tommy Mottola, Carey adopted a new image and traversed towards hip hop with the release of "Butterfly" (1997).  In 1998, she was honored as the world's best-selling recording artist of the 1990s at the World Music Awards and subsequently named the best-selling female artist of the millennium in 2000.