The answer to the crossword is 'ADELE'. ADELE is an English singer-songwriter who released her debut album, '19', in 2008. Her second album, '21', was released in 2011 and featured the hit single 'Rolling in the Deep'. The song was a worldwide success, topping the charts in multiple countries and earning ADELE several awards, including three Grammy Awards. ADELE is one of the most successful artists of the 21st century, having sold over 100 million records worldwide.