One of Eastern Europe's most popular performers, Inna earned an international reputation as an EDM diva, lending heat and personality to house-influenced dance tracks. Hailing from Romania, Inna scored a breakout hit in 2008 with "Hot," a tune that first became a chart success in Romania, then swept through Europe and in 2010 crossed over into America. She also proved to be simpatico with Latin artists, duetting with Daddy Yankee ("More Than Friends") and J Balvin ("Cola Song"), and she also worked with hip-hop stars such as Flo Rida ("Club Rocker") and Pitbull ("All the Things"). As Inna's career progressed, she explored a more pop-oriented sound on her 2017 album Nirvana, as well as Latin and Gypsy influences on 2019's YO. Still, EDM remains a creative touchstone, as on 2020's Heartbreaker and 2022's Champagne Problems, and subsequent singles like "Yummy."

Inna was born Elena Alexandra Apostoleanu in Mangalia, Romania on October 16, 1986. Her mother had a career as a singer and dancer, as did her grandmother, and Elena discovered her love of singing while attending church with her family. Her parents recognized her talent early on, and when she was seven years old they signed her up for lessons with a vocal coach. While Apostoleanu loved music, she was hesitant about making it her career, and in her teens she enrolled at Mangalia's Colegiul Economic (Economy College), where she studied political science. She auditioned for the Romanian group A.S.I.A., but didn't make the cut, and turned to office work to support herself. However, fate stepped in when one of her co-workers heard her singing to herself at the office; her work friend had an in with the successful Romanian production team Play Win, and Apostoleanu was introduced to them. She cut some tracks with them and adopted the stage name Alessandra in 2008; that same year, she made her first television appearance on the show Teo! The name Alessandra didn't last long, and she began using the handle Inna, a nickname her grandfather had given her as a child. Inna released her first single in August 2008, a house-influenced dance track titled "Hot" that topped the Romanian charts, became a success across Europe, and would belatedly hit the American dance airplay chart in 2010. A second single, 2009's "Love," quickly rose to the Top Five in Romania, and Inna's first album, Hot (released in some European markets as Very Hot), arrived in August of that year, and featured another international single, "10 Minutes." Her success led to Inna being named Best Romanian Act at the MTV Europe Music Awards in 2009 and 2010.

Inna's second full-length album, I Am the Club Rocker, arrived in September 2011, and featured guest appearances by Flo Rida ("Club Rocker") and Juan Magan ("Un Momento"). Once again produced by Play Win, the album rose to the Top 20 in Belgium and the Czech Republic and peaked at number eight on the Mexican album charts. Inna's May 2012 single, "Caliente," was a thank you to her fans in Mexico, and two more international singles followed, "Tu Si Eu" and "Inndia." "Caliente" and "Inndia" would appear on Inna's third album, Party Never Ends, which was issued in March 2013; Play Win produced many of the tracks, but several other producers were on board for the project, including DJ Frank E, Orange Factory, Steve Mac, and DJ Smash. The tune "More Than Friends" featured a cameo appearance from reggaeton star Daddy Yankee, and Inna toured the United States for the first time in support of the album. Later the same year, Inna did a guest spot on Pitbull's "All the Things" from his EP Meltdown.

In 2014, Inna signed an American record deal with Atlantic Records, and her first release for the label was the single "Cola Song," which featured J Balvin and was played more than 62 million times on major streaming services. By this time, Inna had over 750,000 followers on Twitter and 12.5 million likes on Facebook, while her videos had collectively been viewed over two billion times. October 2015 brought Inna's self-titled fourth album, which was released in Japan under the title Body and the Sun. Guest stars included J-Son ("Bamboreea"), Eric Turner ("Bop Bop"), and Marian Hill ("Diggy Down"). The album rose to the top of the Romanian charts, but failed to live up to expectations in many other markets, including Japan and Mexico.

In 2016, Inna joined fellow Romanian stars Antonia, Lori, and Alexandra Stan in the all-star project G Girls, who made their debut with the single "Call the Police." They released a second single in 2017, "Milk and Honey," with Lariss taking over for Stan. That same year, Inna became a judge on the Romanian music competition show Vocea României Junior, and in December 2017, she released her fifth album, Nirvana, which mixed stronger pop influences with her usual dance and EDM approach. Unlike her last two albums, the album was recorded entirely in Romania and featured three singles, "Gimme Gimme," "Ruleta," and the title track.

In September 2018, Inna dropped the single "Ra," produced by David Ciente. The track was a preview of Inna's sixth album, 2019's YO, a Spanish-language effort steeped in Latin and Gypsy sounds. The album was Inna's first release in a new American record deal with Jay-Z's Roc Nation label. The following year, she returned with the full-length Heartbreaker, which found her returning to more EDM-influenced dance pop approach. In 2021, she again hit the Top 20 of the Romanian charts with two non-album singles; "Papa" with Sickotoy and Elvana Gjata and "Up," the latter of which was also released in a version with Sean Paul. She continued her stylistic embrace of EDM with 2022's Champagne Problems, released in two parts (#DQH1 and #DQH2). Produced by longtime associates Alexandru Cotoi, Sebastian Barac, and Marcel Botezan, the album also found her incorporating Latin and reggaeton sounds. Several singles followed, including "Magical Love," "Wherever You Go," and "Yummy" (also released in a version with Stefflon Don). ~ Mark Deming, Rovi