Maroon 5- Sugar
When Maroon 5 turned to pop music, they always made big hits. This sweet and sugary song simply called “Sugar” became the album’s biggest hit after managing the second position in the US and one of UK’s biggest sellers this year.
One Direction- Night Changes
One Direction has proven they can make great ballads. This song went to top 10 and top 40 of UK and US respectively, and a big hit over Asia.
Fall Out Boy- Centuries
Fall Out Boy may have failed a top ten entry at some time but they made huge comeback as this song went multi-platinum in US.
Walk the Moon- Shut Up and Dance
This lovely danceable rock tune made a breakthrough this year as it peaked at number four both in US and UK according to Billboard and OCC.
One Direction- Drag Me Down
One Direction has broken record in streaming through this song when it came out. It also became their sixth top 10 in the US according to Billboard and was number 1 in UK.
Fall Out Boy- Uma Thurman
The song which may not be exactly about Uma Thurman but just a reference, went to the top 22 of Billboard Hot 100.
R. City ft. Adam Levine- Locked Away
This song is still hitting the charts at the moment. The song which features Maroon 5’s Adam Levine was a global top 10 hit.
Little Mix- Black Magic
The UK girl group came back with this catchy pop song which easily taken the top spot in UK. It also charted in Billboard Hot 100.
One Direction- Perfect
In support for “Made in the A.M.”, this second single became the boys’ second top 10 from the record and managed the second spot in UK.
Fifth Harmony- Worth It
This can be the girls’ breakthrough as it made to the top 15 in US and top 3 in UK. The saxophone-infused song already went multi-platinum.
Some facts from Wikipedia