iTunes’ top-5 selling singles and albums of the week ending April 18

iTunes’ top-5 selling singles and albums of the week ending April 18 are:

•“E.T. (feat. Kanye West):” Katy Perry

•“S&M (Remix) (feat. Britney Spears):” Rihanna

•“Just Can’t Get Enough:” Black Eyed Peas

•“Judas:” Lady GaGa

•“Rolling In the Deep:” ADELE

“The Middle” (8 p.m., ABC): Talk about a royal pain. On “The Middle,” Frankie’s (Patricia Heaton) obsession with Prince William’s nuptials is freaking everyone out — especially when she buys an expensive new TV on which to view the event.

“Justified” (10 p.m., FX): If you’re not watching “Justified,” you’re missing one of the most gripping dramas of the season. In tonight’s episode, Raylan (Timothy Olyphant) sets out to confront the person who tried to kill him.