The band they showed on AI is a band called R5. They mentioned Adam on twitter yesterday. Someone asked who was your favorite AI contestent and the bands twitter replied Adam. And 5 Seconds of Summer is a pretty well known band they are really starting to blow up.
I do not think the 5SOS (5 Seconds of Summer) is likely to have a big hit in North America. They are getting a lot of sales because they are supporting One Direction on their worldwide tour. Hence the big sales of "She Looks So Perfect" but it peaked in Feb-March in most of the big markets, in late March (4/9/14 BB date) in the US.
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There is not always a big "Summer Song" -- but here is what was top of the charts for the past 10 years in the US for summer:
2013 "Blurred Lines" #1 6/22-9/7/132012 "Call Me Maybe" #1 6/23 - 8/18/12
2011 "Party Rock Anthem" #1 6/16 - 8/20/11
2010 SPLIT "California Gurls" #1 6/19 - 7/24/10 "Love the Way You Lie" #1 7/31 - 9/11/10
2009 THE SUMMER OF BEPs "Boom Boom Pow" #1 4/18 - 7/4/09 "I Gotta Feeling" 7/11 - 10/10/09
An astonishing 26 weeks at #1!!!2008 "I Kissed a Girl" 7/5 - 8/15/08
2007 "Umbrella" 6/9 - 7/21/07
2006 "Promiscuous" 7/8 - 8/12/06
2005 "We Belong Together" 6/4 - 6/25/05 and returned 7/9 - 9/10/052004 -- USHER! Usher had a monster spring hit that had a mid-sized hit for most of the rest of the summer - "Burn" And then another #1 track in the fall. Usher has a #1 track 28 weeks of 2004.
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Ryan Seacrest, not Simon, introduced R5 on Idol.
Is it just from the web buzz?