Power pop is a more aggressive form of pop rock that is based on catchy, melodic hooks and energetic moods.  Author John M. Borack stated in his book Shake Some Action – The Ultimate Guide to Power Pop that the label has often been applied to varied groups and artists with "blissful indifference," noting its use in connection with Britney Spears , Green Day , the Bay City Rollers and Def Leppard . 
A question on many of your fans lips, I’m sure: what were your favourite releases of the past year? Indeed, if it’s not too much of a stretch, what new releases of the decade so far have stuck with you the most?
For some reason, maybe finally getting free of an obligation to participate in the Village Voice Pazz and Jop poll, I stopped thinking in these terms some time ago. Partly it’s my own prejudices and unwilled borders, but I no longer really care what’s selling, what absolutely dominates, what’s radical and new, and find myself focusing on stuff that trips me up, surprises me, old and new. It’s not intentional obscurity. But just as I could never find myself interested in any larger questions relating to, say, Radiohead or Arcade Fire, because I found their music tiresome, obvious, pretentious, and empty, my best discovery this year was Hanif Addurraqib’s They Can’t Kill Us Until They Kill Us , a collection by a music critic from Columbus, Ohio, and the performer who’s most captivated me over the past years, from her original Saturday Night Live performance on, is Lana Del Rey.
People often feel that the most popular "oldies" were from the 50'. The Reality is that much of the early 1950's was characterized by the "crooners" from the 1940's and many of the popular songs attributed to the 1950's are actually from the early 1960's. In the tables that follow for 1955-1965, the Top 20+ Groups/Performers in order of frequency are as follows: