'Weird Al' Yankovic tops charts with parody album

US comedian-singer "Weird Al" Yankovic has scored a career-first number one album following a viral video campaign parodying two of the biggest hits of the past year.
Yankovic, 54, famed for his spoof 1984 version of Michael Jackson's "Beat It" -- "Eat It" -- finally found chart-topping glory after coming up with comic versions of Robin Thicke's "Blurred Lines" and Pharrell's "Happy."
Thicke's "Blurred Lines" has become reimagined as "Word Crimes" -- a lighthearted rallying cry against poor grammar -- while "Happy" is aped as "Tacky," poking fun at eccentric fashion tastes.
Both parodies were included on the album "Mandatory Fun" which has debuted at number one on Billboard's 200 chart.
It is the first comedy album to reach top spot since 1963 and logged the highest weekly sales of any comedy album for 20 years.
The success of "Mandatory Fun" has been fuelled by a viral video campaign featuring eight tracks on the album.
New Zealand singer Lorde is also targeted on the album, with her blockbuster hit "Royals" redone as "Foil", an ode to aluminum wrapping.