Question: "Contagious Love" is a song by American singers Bella Thorne and Zendaya, Zendaya's music career began in which year, when she released the single "Swag It Out", followed by the single "Watch Me" (with Bella Thorne); the former was released by an independent record label?

Context articles: Bella Thorne discography
Zendaya discography
Zendaya
Henry Santos
Down Down Baby
Fashion Is My Kryptonite
Watch Me (Bella Thorne and Zendaya song)
Swag It Out
Made in Japan (EP)
Contagious Love

American singer Bella Thorne has released two extended plays, three singles, one featured single, four promotional singles, and six music videos. Thorne's first single, "Watch Me", was released on June 21 featuring Zendaya and reaching 86 on the United States "Billboard" Hot 100 charts.
 9 on the US Top Heatseekers charts and earning RIAA: Gold.
 The second single, "TTYLXOX", was released on March 6, reaching 97 on the US "Billboard" Hot 100 charts.
The discography of Zendaya, an American singer and songwriter, consists of one studio album, four singles, eight promotional singles, fifteen music videos and some album appearances.
 Her first appearance was as part of Kidz Bop Kids on album "Kidz Bop Dance Party", in 2010.
 In 2011 Zendaya released her debut independent single, "Swag It Out".
 Her next single, "Watch Me", peaked at number 86 on Billboard.
Zendaya's music career began in 2011 when she released the single "Swag It Out", followed by the single "Watch Me" (with Bella Thorne); the former was released by an independent record label.
 She signed a major record deal with Hollywood Records on August 8, 2012, and started recording songs for her debut album on August 12, 2012.
 The album, titled "Zendaya", was released on September 17, 2013, preceded by the single "Replay".
Henry Santos (born Henry Santos Jeter on December 15, 1979) is a Dominican artist.
 Best known for his tenure as a singer and songwriter in the bachata supergroup Aventura, Henry Santos is a Dominican vocalist from New York City, who made his debut as a solo artist in 2011.
 Born Henry Santos Jeter, December 15, 1979, in Moca, Espaillat, Dominican Republic, he moved with his family to the Bronx, NY, at age of 13.
 He is cousin of bachata star Romeo Santos, with whom he co-founded Aventura in 1996.
 Originally known as "Los Tinelles", the group made its full-length debut with “Trampa De Amor” in 1998.
 Aventura became recognized worldwide with the smash hit "Obsesión" from their third album, We Broke The Rules (2002).
 Aventura’s success was elevated by "Ella Y Yo", a collaboration with the reggaeton artist Don Omar from their fifth Studio album God’s Project (2005).
 It was the first of ten straight top ten hits on the Billboard Hot Latin Songs chart.
 After nine albums (six studio and three live efforts) Aventura announced their separation in 2011.
 Later that year, Henry Santos & Romeo released solo albums.
 Introducing Henry Santos (2011) debuted number 2 on the Billboard Tropical Albums Chart.
 Hits such as ‘Poquito A Poquito’, ‘Por Amor (Mi Fiel Fanatica)’ and ‘Por Nada’ were favorites among worldwide bachata listeners.
 His second studio album Henry Santos My Way (2013) positioned two number-one hits on Billboard’s Tropical Songs Chart with "My Way" and “La Vida“.
 In 2015, after the disappearance of Siente Music, the label that represented Santos (collaboration between Venemusic & Universal Music Group), Henry continued his independent solo career under his own record label (Hustlehard Entertainment LLC) releasing two successful productions: Henry Santos The Third Deluxe (2016), with the hits “Y Eres Tan Bella“, “Quédate”, “Cuídame”, “ Ella Me Dijo” and “Si Me Besa Tu Boca”, ranking at number 8 on iTunes’ Latin Albums Chart & number 4 on Amazon, and Henry Santos The Live Album, Sólo Éxitos (2017).
 This is a Live Album compilation of all Henry Santos hits, including all the hits he penned for legendary latin Grupo Aventura.
 From Henry Santos' solo breakout hit "Poquito A Poquito" to one of the most popular Grupo Aventura tracks performed at 2011's Festival Viña Del Mar "Nueve & Quince", we’re are able to relive all the glorious moments of Henry Santos' 20-year music career.
 Hits like "Deja Vú", "Bésame Siempre", "Cuídame" & "Trece Días (Migajitas De Amor)", reminds us why Henry Santos is known as one of the original Kings Of Modern Bachata.”
"Down Down Baby" is a clapping game played by children in English-speaking countries.
 In the game, two or more children stand in a circle, and clap hands in tune to a rhyming song.
 As with most hand-clapping games, there are many variations.
 Modified versions of the song have appeared in Little Anthony and the Imperials's "Shimmy Shimmy Ko-Ko Bop", Nelly's "Country Grammar", Simian Mobile Disco's "Hotdog", The Damned's "New Rose", The Drums' "Let's Go Surfing", Usher's "OMG", Carter USM's "Turn On, Tune In, And Switch Off", Bella Thorne and Zendaya's "Contagious Love", the film "Big" and EXO's "Ko Ko Bop".
"Fashion Is My Kryptonite" is a song by American singers Bella Thorne and Zendaya, from extended play (EP) "Made in Japan".
 It was released as promotional single on iTunes on July 20, 2012.
"Watch Me" is a song performed by American pop recording artists Bella Thorne and Zendaya.
 It was produced by Ben Charles, Aaron Harmon, and Jim Wes, who also co-wrote the song for ""</small> (2011), the soundtrack to the Disney Channel television series, "Shake It Up".
 It was released as promotional single on June 21, 2011 through Walt Disney Records.
 Musically, the song is prominent electropop that runs through a club-oriented beat.
 An original version of the song, sung by Margaret Durante, and is also included on the .
"Swag It Out" is the official debut single by American singer Zendaya, known for starring in the series "Shake It Up".
 The song was composed by Bobby Brackins and was released on May 30, 2011 as the first single of Zendaya's career on an independent label, not being included on any album or soundtrack of Walt Disney Records, just their record label.
"Made in Japan" is the debut extended play and soundtrack by American singers Bella Thorne and Zendaya, featured songs from the Walmart exclusive version of "" soundtrack.
 The album was released on August 21, 2012 by Walt Disney.
 "Fashion is My Kryptonite" was released as promotional single on July 20, 2012.
"Contagious Love" is a song by American singers Bella Thorne and Zendaya, and from soundtrack album "".
 It was released as promotional single on February 14, 2013 in United States and February 19, worldwide.