Jennifer Lopez went from drab to fab on the Los Angeles set of American Idol on Wednesday.

The 45-year-old pop diva showcased her famously curvaceous figure in a nude, leather bustier bodycon mini-dress.

The Booty hitmaker finished her sexy, form-fitting look with translucent Louboutins, smoky eyes, and hair extensions in a half-updo.

Transformation! Jennifer Lopez went from drab to fab on the Los Angeles set of American Idol on Wednesday

JLo currently judges the 14th season of the singing competition, which airs Wednesdays and Thursdays on Fox.

Earlier, the two-time Grammy nominee was dressed way down in unflattering, grey drop-crotch shorts.

Jennifer went make-up free beneath shades and scraped her brunette bob into a messy top bun.

Not an inch to pinch: The 45-year-old pop diva showcased her famously curvaceous figure in a nude, leather bustier bodycon mini-dress

Makeover: The Booty hitmaker finished her sexy, form-fitting look with translucent Louboutins, smoky eyes, and hair extensions in a half-updo

Double elimination: J-Lo headed into the American Idol studio where the field was later narrowed to nine

Sultry look: The singer was spotted giving a sultry look before the taping

Standing out: Jennifer stood out in the crowd in her sexy dress

The Feel the Light singer accessorised with large diamond stud earrings, sparkly gold high-tops, and a grey cowl neck hoodie.

The Boy Next Door actress also voices matriarch Lucy Tucci in Dreamworks Animation’s Home, which finally hits US theatres this Friday.

In the 3D alien flick, Lopez plays Rihanna’s mother despite the sexy singers only having an 18-year age difference.

Airs Wednesdays and Thursdays! JLo currently judges the 14th season of the Fox singing competition with Harry Connick Jr. and Keith Urban

Not her best look: Earlier, the two-time Grammy nominee was dressed way down in unflattering, grey drop-crotch shorts

Just Jenny from the block: Jennifer went make-up free beneath shades and scraped her brunette bob into a messy top bun

Turtle power: The Feel the Light singer accessorised with large diamond stud earrings, sparkly gold high-tops, and a grey cowl neck hoodie

Jennifer made sure to bring her twins Emme and Max, 7 (with ex-husband Marc Anthony), to Sunday afternoon’s Westwood premiere.

Her former toyboy Casper Smart – who turns 28 next month – was also spotted lurking outside the Regency Village Theatre.

‘[Jennifer and I] got a lot of ties. We’re very close,’ Casper told E! News, claiming he was Home’s choreographer.