A-side and B-side originally referred to the two sides of gramophone records on which singles were released beginning in the 1950s. The terms have come to refer to the types of song conventionally placed on each side of the record, with the A-side being the featured song (the one that the record producer hopes will receive radio airplay and become a "hit"), while the B-side, or flipside, is a secondary song that often does not appear on the artist's LP.

The earliest 10-inch, 78 rpm, shellac records were single sided. Double sided recordings, with one song on each side, were introduced in Europe by Columbia Records and by the late 1910s they had become the norm in both Europe and the USA. There were no record charts until the 1930s, and radio stations (by and large) did not play recorded music until the 1950s (when top 40 radio overtook full-service network radio). In this time, A-sides and B-sides existed, but neither side was considered more important; the "side" did not convey anything about the content of the record.

Leo Romero (born November 28, 1986, in Fontana, California, U.S.) is a professional skateboarder. Leo is second generation Mexican American. Leo first started skating around 1997 with his friends, "the Death Junkies". His early influences included Jamie Thomas and Andrew Reynolds, which perhaps explains Leo's tendency to skate large obstacles and handrails. He lived at the Emerica Mansion II with Heath Kirchart, Kevin "Spanky" Long, and Bryan Herman. He recently bought his very own home with well known DJ M3MO(Guillermo Aguilar) in Long Beach, California.

In 2009, Leo left Baker Skateboards, switching to Toy Machine.

Romero owns a restaurant in Compton, CA.

Leo Romero is currently sponsored by Toy Machine." Toy Machine and Emerica have teamed up to offer a Leo Romero signature shoe line.

Leo is a gun aficionado.

Leo Romero won Thrasher Magazine's annual Skater of the Year award in 2010.

Jerry Hsu (pronounced Hu Suey) (born December 17, 1981, in San Jose, California) is a professional skateboarder. His parents are both immigrants from Taiwan.

At the age of nine, Hsu began recording himself skateboarding, for the purpose of discovering what his skateboarding really looked like. He rode for Maple with Louie Barletta, Chad Bartie, Chad Night, and others in the early 2000's (see Rodney Mullen with Marc Johnson). This footage has been featured on the internet show, "Epicly Later'd".

Hsu is featured in Enjoi's skateboarding video, for which he won an award for best video part by Transworld Skateboarding magazine, in addition to a readers' choice award. Hsu also has his own promodel shoe with Emerica, the Hsu.

He is featured as a playable character in the skateboarding video game EA Skate, as well as its sequels.

He expresses interest in photography, and contributes work to Vice magazine. In September 2010 he exhibited a body of photographic work at the Steinsland Berliner Gallery in Stockholm under the title Vatican Gold alongside artists Ed Templeton, Kevin Long and Jonnie Craig.

Avril Ramona Lavigne (pronunciation: /ˈævrɨl ləˈviːn/; AV-ril lə-VEEN; born 27 September 1984) is a Canadian singer-songwriter. She was born in Belleville, Ontario, but spent most of her youth in the small town of Napanee. By the age of 15, she had appeared on stage with Shania Twain; by 16, she had signed a two-album recording contract with Arista Records worth more than $2 million. In 2002, when she was 17 years old, Lavigne broke onto the music scene with her debut album Let Go.

Let Go made Lavigne the youngest female soloist to reach No. 1 in the UK, and the album was certified four-times platinum by the Recording Industry Association of America. By 2009, over 16 million copies had been sold worldwide. Her breakthrough single, "Complicated", peaked at No. 1 in many countries around the world, as did the album Let Go. Her second album, Under My Skin, was released in 2004 and was her first album to peak at No. 1 on the U.S. Billboard 200, eventually selling more than 10 million copies worldwide. The Best Damn Thing, Lavigne’s third album, was released in 2007, becoming her third No. 1 album in the UK Albums Chart and featuring her first U.S. Billboard Hot 100 No. 1 single, "Girlfriend". Lavigne has scored six number-one singles worldwide, including "Complicated", "Sk8er Boi", "I'm with You", "My Happy Ending", "Nobody's Home", and "Girlfriend". With more than 30 million copies of her albums sold worldwide, Lavigne is one of the top-selling artists releasing albums in the U.S., with over 10.25 million copies certified by the RIAA. Her fourth studio album, Goodbye Lullaby, was released in March 2011. Goodbye Lullaby gave Lavigne her fourth top 10 album on the U.S. Billboard 200 and the UK Albums Chart and her third No. 1 album in both Japan and Australia. Three months after the release of Goodbye Lullaby, Lavigne began work on her fifth album, which will be released on Epic Records following her departure from RCA Records.

Tame Impala is the psychedelic rock project of Kevin Parker from Perth, Australia. They are signed to Modular Records. The band came to prominence in 2010 with the release of their debut album, Innerspeaker. Their name refers to the impala, a medium sized antelope. They like to see themselves as "a steady flowing psychedelic groove rock band that emphasizes dream-like melody."

Tame Impala were formed from Kevin Parker's original blues/jazz/psychedelic band, the Dee Dee Dums. The Dee Dee Dums consisted of Parker (drums ) and Luke Epstein (guitar), with the band getting second place at the 2005 AmpFest and winning third place that year in the state final of The Next Big Thing. In October 2006 Epstein was replaced by drummer Sam Devenport, Epstein going on to play with Sugarpuss. The Dee Dee Dums went on to win the WA state final of the National Campus Band Competition. In late 2007 the band renamed to Tame Impala unveiling another new drummer and replacing the two-guitar attack for the more traditional guitar/bass/drums format. Devenport went on to pursue an acting career.