Kanye West
On September 13, 2009, during the 2009 MTV Video Music Awards while Taylor Swift was accepting her award for Best Female Video for "You Belong with Me", West went on stage and grabbed the microphone to proclaim that Beyoncé's video for "Single Ladies (Put a Ring on It)", nominated for the same award, was "one of the best videos of all time". He was subsequently removed from the remainder of the show for his actions. When Beyoncé later won the award for Best Video of the Year for "Single Ladies (Put a Ring on It)", she called Swift up on stage so that she could finish her acceptance speech. West was criticized by various celebrities for the outburst, and by President Barack Obama, who called West a "jackass". In addition, West's VMA disruption sparked a large influx of Internet photo memes with blogs, forums and "tweets" with the "Let you finish" photo-jokes. He posted a Tweet soon after the event where he stated, "Everybody wanna booooo me but I'm a fan of real pop culture... I'm not crazy y'all, I'm just real." He then posted two apologies for the outburst on his personal blog; one on the night of the incident, and the other the following day, when he also apologized during an appearance on "The Jay Leno Show". After Swift appeared on "The View" two days after the outburst, partly to discuss the matter, West called her to apologize personally. Swift said she accepted his apology. In September 2010, West wrote a series of apologetic tweets addressed to Swift including "Beyonce didn't need that. MTV didn't need that and Taylor and her family friends and fans definitely didn't want or need that" and concluding with "I'm sorry Taylor." He also revealed he had written a song for Swift and if she did not accept the song, he would perform it himself. However, on November 8, 2010, in an interview with a Minnesota radio station, he seemed to recant his past apologies by attempting to describe the act at the 2009 awards show as "selfless" and downgrade the perception of disrespect it created.
Kanye West
On February 8, 2015, at the 57th Annual Grammy Awards, West walked on stage as Beck was accepting his award for Album of the Year and then walked off stage, leaving the audience to think he was joking. After the awards show, West stated in an interview that he was not joking and that "Beck needs to respect artistry, he should have given his award to Beyoncé". On February 26, 2015, he publicly apologized to Beck on Twitter. On August 30, 2015, West was presented with the Michael Jackson Video Vanguard Award at the MTV Video Music Awards. In his acceptance speech, he stated, "Y'all might be thinking right now, 'I wonder did he smoke something before he came out here?' And the answer is: 'Yes, I rolled up a little something. I knocked the edge off.'" At the end of his speech, he announced, "I have decided in 2020 to run for president." At the 2016 MTV Video Music Awards, West was given four minutes to do "whatever he wanted". He chose to debut his new music video for "Fade", but first, delivered a speech in which he discussed recent shootings in Chicago, why he included Ray J and Donald Trump in his "Famous" video, the Taylor Swift situation, his love of Beyoncé and Steve Jobs amongst others.

Question: To which artist did Kanye profusely apologize to?
Answer: Taylor Swift