Makeover! Ashton Kutcher looks sporty in rugged denim jacket before slipping into designer tux to SING on Jimmy Kimmel Live with Kristen Bell

Ashton Kutcher had a big makeover on Tuesday.

The That '70s Show star wore a worn-in denim jacket as he walked into Jimmy Kimmel Live in Hollywood.

But once inside the husband of Mila Kunis changed into a snazzy tux to belt out a song with Kristen Bell, Bono, Rita Wilson, DJ Khaled, Bryan Cranston and Sean 'Diddy' Combs for the reunion of the (RED)Pack.??

Dressed down: Ashton Kutcher wore a rugged denim jacket in Hollywood on Tuesday

Dressed down: Ashton Kutcher wore a rugged denim jacket in Hollywood on Tuesday

In addition to his jean jacket, he also had on dark slacks and lace-up boots
In addition to his jean jacket, he also had on dark slacks and lace-up boots

His look: The former model paired the denim jacket with black slacks and combat boots

The stars sang the tune We're Going to Hell.?The chorus of the tune was, 'If we don't help people with AIDS, we're going to hell.'

The comical ditty was created by The Killers lead singer, Brandon Flowers, in tribute to the global fight against AIDS.

Kutcher's daytime look was comfortable and cool for fall in Los Angeles.

On the air: Ashton looked dashing in a tux alongside Kristen Bell and Bono

On the air: Ashton looked dashing in a tux alongside Kristen Bell and Bono

Pitch perfect: The (RED)Pack reunited for a musical number. (Left to right): DJ Khaled, Rita Wilson, Sean 'Diddy' Combs, Bono, Kimmel, Bell,  Kutcher, and Bryan Cranston

Pitch perfect: The (RED)Pack reunited for a musical number. (Left to right): DJ Khaled, Rita Wilson, Sean 'Diddy' Combs, Bono, Kimmel, Bell, Kutcher, and Bryan Cranston

Martini moments: Kutcher belted out a solo verse during the rendition of We're Going to Hell

Martini moments: Kutcher belted out a solo verse during the rendition of We're Going to Hell

He paired the jean jacket with black pants, a white tee, and lace-up black combat boots.?

The star was seen walking with a woman, who is likely a part of his team, and two security guards.

For the show, Kutcher looked red-carpet ready in a designer tux and black bow tie.?

Next: After he sang, The Ranch star performed a skit with Wilson. This portion of the show was called (SHOPATHON)RED

Next: After he sang, The Ranch star performed a skit with Wilson. This portion of the show was called (SHOPATHON)RED

Shock and awe: A random audience member was selected for a makeover using RED products. Rita then put a towel on the person's head and the camera cut away. When it came back, she lifted the towel and the audience member had been replaced by Kutcher

Shock and awe: A random audience member was selected for a makeover using RED products. Rita then put a towel on the person's head and the camera cut away. When it came back, she lifted the towel and the audience member had been replaced by Kutcher

Reflection check: The ex-husband of Demi Moore looked in the mirror and said, 'I look like a monster'

Reflection check: The ex-husband of Demi Moore looked in the mirror and said, 'I look like a monster'

At one point he hammed it up as he held up a silver martini glass.?

After he sang, The Ranch star performed a skit with Wilson and Bell. This portion of the show was called (SHOPATHON)RED.

A random audience member was selected for a makeover using RED products.

Rita then put a towel on the person's head and the camera cut away. When it came back, she lifted the towel and the audience member had been replaced by Kutcher.?

The ex-husband of Demi Moore looked in the mirror and said, 'I look like a monster.'

The entirety of Tuesday night's show was dedicated to RED?—a product driven organization, founded by Bono, that benefits the global fight against AIDS.?

Take me out: Here Ashton is seen with his wife Mila Kunis at an LA Dodgers ?game in 2016

Take me out: Here Ashton is seen with his wife Mila Kunis at an LA Dodgers ?game in 2016

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