After topping the Aussie charts in 2006 and 2007, Rihanna reclaims her throne atop the ARIA singles chart thanks to “Rude Boy” this week. Her fourth number one, “Rude Boy” follows previous Australian hits “SOS,” “Umbrella” and “Don’t Stop The Music.” “Rude Boy” jumped Jason Derulo’s growing single “In My Head” to claim the top spot. The single is also followed by David Guetta and Kid Cudi’s “Memories” Taken from “Rated R,” “Rude Boy” is Rihanna’s second single to top a chart in 2010.