What were the most popular songs of the 2010s?
Here are some of the most popular songs of the 2010s:

- Rolling in the Deep by Adele
- Happy by Pharrell Williams
- Can't Stop the Feeling! by Justin Timberlake
- Uptown Funk by Mark Ronson ft. Bruno Mars
- I Gotta Feeling by The Black Eyed Peas
- Counting Stars by OneRepublic
- We Are Young by fun. ft. Janelle Monáe
- Roar by Katy Perry
- Shake It Off by Taylor Swift
- Blank Space by Taylor Swift

These songs were all released between 2010 and 2019, and they all had a major impact on popular culture. They had extensive playtime on the radio, streamed online, and featured in movies, TV shows, and commercials. They also won many awards, including Grammys, Billboard Music Awards, and MTV Video Music Awards.
What are the most popular metal songs of that decade?
There were many popular metal songs released during the 2010s. Here are some of the most notable ones:

The Sound of Silence by Disturbed (2015)
Hail to the King by Avenged Sevenfold (2013)
Square Hammer by Ghost (2016)
Backbone by Gojira (2016)
Do Not Look Down by Meshuggah (2012)
Dystopia by Megadeth (2016)
Fear of the Dark by Iron Maiden (2011)
Blood and Thunder by Mastodon (2011)
Bloodstream by Ed Sheeran feat. Rudimental (2014) [remixed by Arty]
Unchained by Van Halen (2012) [remastered]
Afterlife by Slipknot (2010)
The Pretender by Foo Fighters (2011) [re-released in 2018]
Welcome Home by Coheed and Cambria (2010)
The Stage by Avenged Sevenfold (2016)
Cirice by Ghost (2015)

Note that this is not an exhaustive list, and opinions on what constitutes a popular metal song may vary.