Why?: Not the best option for 2nd single imo, but "C'mon" is a nice song from Ke$ha, and one of my favorite music videos from her. There is still one song left from her
Matt & Kim
"It's Alright"
Album: Lightning
Watch The Video Here
Why?: One of the most amazing music videos from 2013! Matt & Kim never disappoint with their music videos, always amazing. Too bad the song is not the best from theim, but still a nice tune
Everything Everything
"Don't Try"
Album: V
Watch The Video Here
Why?: Another song that didn't debut on my weekly countdown, but it's too awesome! It was one of my least favorite songs when I heard their album but it really grew on me. This is their last entry this year
Panic! At The Disco
"Girls/Girls/Boys"
Album: Too Weird To Live, Too Rare To Die!
Watch The Video Here
Why?: I've always been a casual fan of Panic! At The Disco... but when I first heard "Miss Jackson" I was so disappointed. That song was terrible, like a copy from the new FOB's music... and I really hate the new FOB's music. The 2nd single was a little bit better... but still boring. Thanks God they released "Girls/Girls/Boys" Not their best single, but it's a good song... the music video is weird though
Paramore
"Now"
Album: Paramore
Watch The Video Here
Why?: Almost everyone seems to hate this Paramore song, and I really don't know why! It's a good first single for me... although Hayley looks so strange in the music video There is still one song left from them
Hold On, We're Going Home and Ho Hey are lovely
There is still one song left from them 
Looks like her UK peak of C'Mon 
Paramore too 