Last week we brought you the year in celebrity sideboob. But most dudes would agree that sideboob is a mere jumping off point. Sure, we can all appreciate it, but cleavage is where headlines are made. Last year’s list was dominated by Katy Perry, Jenn Sterger, and Christina Hendricks. Katy and Christina return for this year’s rundown, but the likes of Nicole Scherzinger, Kate Upton, and January Jones definitely give them a run for their (milk?) money. Check out our mega gallery below then let us know whose cleavage created the most buzz in our comments section.