How native speakers pronounce “bestseller”

I've won several industry awards. My book stayed on the "USA Today" bestseller list for several weeks in a row.

How to Turn Setbacks into Success | Amy Shoenthal | TED · TED

went out in the world for some reason, and became this big, mega-sensation, international bestseller thing. The result of which is that everywhere I go now,

Your elusive creative genius | Elizabeth Gilbert