Question: Who is the new singer of asking alexandria?

Disambiguated questions and answers:
context: On 22 January 2015, lead singer Danny Worsnop announced his departure from Asking Alexandria to focus on his new band We Are Harlot, of which it was quickly stated that his replacement was already found. On 26 May 2015, Stoff was officially announced as the new lead vocalist when they released their first single together titled "I Won't Give In" on 27 May. Speculation regarding Stoff's involvement started shortly after Worsnop's departure due to similarities between Asking Alexandria and Make Me Famous (who were said to have been ripping off the band); the fact that they were label mates would have made the transition easy for Stoff to make, and on his personal YouTube account he had covered multiple Asking Alexandria songs. Ben Bruce was asked if he considered anyone else for the role and he stated that "it has to be Denis" before praising his vocal ability. When Shaforostov himself was asked how he would distinguish himself from Worsnop, he stated he would not make any comparison since he is a completely different person.
question: Who replaced the original lead singer of asking alexandria?
short_answers: Danny Robert Worsnop
Danny Worsnop
wikipage: Denis Stoff
context: No context provided
question: Who was revealed as the new lead singer of asking alexandria in May 2015?
short_answers: Denis Stoff
Denis Alexandrovich Shaforostov
context: On 22 January 2015, lead singer Danny Worsnop announced his departure from Asking Alexandria to focus on his new band We Are Harlot, of which it was quickly stated that his replacement was already found. On 26 May 2015, Stoff was officially announced as the new lead vocalist when they released their first single together titled "I Won't Give In" on 27 May. Speculation regarding Stoff's involvement started shortly after Worsnop's departure due to similarities between Asking Alexandria and Make Me Famous (who were said to have been ripping off the band); the fact that they were label mates would have made the transition easy for Stoff to make, and on his personal YouTube account he had covered multiple Asking Alexandria songs. Ben Bruce was asked if he considered anyone else for the role and he stated that "it has to be Denis" before praising his vocal ability. When Shaforostov himself was asked how he would distinguish himself from Worsnop, he stated he would not make any comparison since he is a completely different person.
question: Who returned to be lead singer of asking alexandria after Stoff left?
short_answers: Danny Robert Worsnop
Danny Worsnop
wikipage: Denis Stoff

Long-form answers:
knowledge: content: Asking Alexandria are a British rock band from York, North Yorkshire, consisting of guitarists Ben Bruce and Cameron Liddell, drummer James Cassells, lead vocalist Danny Worsnop, and bassist Sam Bettley.
wikipage: Asking Alexandria
content: Danny Robert Worsnop (born 4 September 1990) is an English musician, singer, songwriter, vocal producer, and actor.
wikipage: Danny Worsnop
content: Denis Alexandrovich Shaforostov (Ukrainian: Денис Олександрович Шафоростов; born 4 May 1992),[1] also known by his stage name Denis Stoff, is a Ukrainian musician best known for his work as a guitarist and vocalist of the Ukrainian metalcore group Make Me Famous and as the ex-lead vocalist of the British rock band Asking Alexandria during original singer Danny Worsnop's 18-month hiatus from the band.
wikipage: Denis Stoff
long_answer: British rock band Asking Alexandria has changed its lead singer several times. The band's original lead singer was replaced by Danny Worsnop, an English musician, singer, songwriter, vocal producer, and actor. In May 2015, the band's new lead singer was revealed to be Ukrainian musician Denis Stoff, who was its lead vocalist during Worsnop's 18-month hiatus from the band. Worsnop returned to be the band's lead singer after Stoff left.