Rovio can add another feather (hoho) to its cap today, as Angry Birds dominates yet another app store.

The foul-flinging casual games behemoth is now PlayStation Network's best-selling game, despite having only been available on PSN since January.

The news comes via analyst Colin Sebastian of Lazard Capital Markets, who also points out that PlayStation Network now has over 75 million registered accounts worldwide.

Sebastian doesn't say exactly how many Angry Birds downloads PSN has seen, but does mention, "over 1.4 billion pieces of content downloaded since launch".

For Angry Birds to clock the lion's share of that figure in just four months is impressive indeed.