Billboard put together a list of the top 75 moments that have defined the decade in music and it's pretty complete but these are some of the highlights.
September 12th, 2010: Lady Gaga wears a meat dress to the "VMAs".
November 16th, 2010: The Beatles put their music on iTunes.
April 26th, 2011: "The Voice" debuts on NBC.
July 14th, 2011: Spotify arrives in America.
August 8th, 2011: Jay-Z and Kanye West release "Watch the Throne".
February 11th, 2012: Whitney Houston dies.
June 2nd, 2012: Adam Lambert becomes the first openly gay male artist to hit #1 on the Billboard 200 chart.
December 21st, 2012: Psy's "Gangnam Style" video hits a billion views on YouTube.
February 3rd, 2013: Beyoncé plays halftime of Super Bowl 47.
August 25th, 2013: Miley Cyrus and Robin Thicke did . . . whatever the hell you call that thing they did . . . at the "VMAs".
January 26th, 2014: Macklemore & Ryan Lewis beat Kendrick Lamar for Best Rap Album at the "Grammys".
May 12th, 2014: TMZ releases the elevator video of Jay-Z, Beyoncé and Solange.
September 9, 2014: U2's "Songs of Innocence" was FORCED on people via the new iPhone 6.
November 15th, 2014: Taylor Swift's "1989" sells 1.287 million in first week.
March 10th, 2015: A jury rules that Robin Thicke and Pharrell borrowed a little too much from Marvin Gaye for "Blurred Lines".
October 30th, 2015: Kanye West announces his 2020 presidential candidacy at the "VMAs".
November 13th, 2015: There was a terrorist attack at an Eagles of Death Metal concert in Paris.
January 10th, 2016: David Bowie dies.
April 21st, 2016: Prince dies at 57.
April 23rd, 2016: Beyoncé premieres "Lemonade" on HBO.
June 24th, 2016: Kanye West debuts his "Famous" video with all those creepy mannequins of famous people in a bed together.
March 30th, 2017: Streaming overtakes music sales.
June 4th, 2017: Ariana Grande returns to the U.K. to headline the One Love Manchester Concert.