Even though the spins started in 2009, I would say that most spins in 2010 have been:
"Tik Tok"
"Telephone"
"Hey Soul Sister"
"In My Head"
More exclusive to 2010, I would say when all is said and done the most spins will be:
"Break Your Heart"
"Airplanes"
"California Gurls" - fast riser, but could be a faster burner too.
"Your Love Is My Drug"
"Bulletproof" - has shown good staying power. 16 weeks on the chart and still climbing.