"Billboard" has released their annual Songs of the Summer rundown.  It's not subjective . . . it's determined based on the overall performance of the singles on the Billboard Hot 100 chart from Memorial Day through Labor Day.

Here's the Top 10:

1.)  "Call Me Maybe",  Carly Rae Jepsen

2.)  "Payphone",  Maroon 5, featuring Wiz Khalifa

3.)  "Somebody That I Used to Know",  Gotye, featuring Kimbra

4.)  "Wide Awake",  Katy Perry

5.)  "Lights",  Ellie Goulding

6.)  "Where Have You Been",  Rihanna

7.)  "We Are Young",  Fun, featuring Janelle Monae

8.)  "Titanium",  David Guetta, featuring Sia

9.)  "Starships",  Nicki Minaj

10.)  "Whistle",  Flo Rida