Halsey sports chic floral dress with thigh-high slit for sold-out John Mayer concert at The Forum in LA

She's made a name for herself in the music industry.

But Halsey was intent on having a night off from performing as she headed to John Mayer's concert at The Forum in Inglewood, California on Saturday night.

The 24-year-old singer oozed '90s vibes wearing a flirty floral gown with a thigh-high slit while making her way through the parking lot and into the venue to watch the legendary guitarist at work.

Super fan: Halsey was intent on having a night off from performing as she headed to John Mayer's concert at The Forum in Inglewood, California on Saturday night

Super fan: Halsey was intent on having a night off from performing as she headed to John Mayer's concert at The Forum in Inglewood, California on Saturday night

Halsey showed off her killer figure in a retro-inspired dress with thick straps and a sweetheart neckline.

Her black-and-white floral gown draped down past her knees and she revealed some skin with a thigh-grazing slit.

The Without Me songstress made sure to stay comfortable for a night of dancing as she wore a pair of black leather cowboy boots. 

Fashion: The 24-year-old singer oozed '90s vibes wearing a flirty floral gown with a thigh-high slit while making her way through the parking lot and into the venue to watch the legendary guitarist at work

Fashion: The 24-year-old singer oozed '90s vibes wearing a flirty floral gown with a thigh-high slit while making her way through the parking lot and into the venue to watch the legendary guitarist at work

Date: Ireland Baldwin was also spotted making her way around the venue for a romantic night out with her boyfriend Slater Trout

Date: Ireland Baldwin was also spotted making her way around the venue for a romantic night out with her boyfriend Slater Trout

She wore her dark brunette hair in a short and sweet bob and kept her makeup simple with just a touch of liner and lashes.

Ireland Baldwin was also spotted making her way around the venue for a romantic night out with her boyfriend Slater Trout.

The 23-year-old model sported a silky green wrap dress with a plunging neckline and a pair of black leather boots.

Trout opted for a more incognito look, and wore black slacks with a green sweatshirt and a hood covering his bright blonde hair. 

Music lover: The 23-year-old model sported a silky green wrap dress with a plunging neckline and a pair of black leather boots

Music lover: The 23-year-old model sported a silky green wrap dress with a plunging neckline and a pair of black leather boots 

Will call: Trout opted for a more incognito look, and wore black slacks with a green sweatshirt and a hood covering his bright blonde hair

Will call: Trout opted for a more incognito look, and wore black slacks with a green sweatshirt and a hood covering his bright blonde hair

Before playing one of his arguably most popular songs on Friday night, John joked with the crowd about the ebbs and flows of his 'tumultuous relationship' with creating Your Body is a Wonderland; seen at his San Diego stop at the Viejas Arena

Before playing one of his arguably most popular songs on Friday night, John joked with the crowd about the ebbs and flows of his 'tumultuous relationship' with creating Your Body is a Wonderland; seen at his San Diego stop at the Viejas Arena

Mayer announced his summer tour earlier this year with 27 stops across the United States throughout the summer and ending last night in Los Angeles, with Dead & Company joining in to play a few classic hits.

Before playing one of his arguably most popular songs on Friday night, John joked with the crowd about the ebbs and flows of his 'tumultuous relationship' with creating Your Body is a Wonderland. 

'You're allowed to ironically celebrate your past,' he told the audience before pouring his heart into the song which he wrote when he was 21.

Mayer jumped onto the music scene with Room for Squares in 2001, with a follow up album called Heavier Things in 2003.

He's since added five more records to his catalog (Continuum, Battle Studies, Born and Raised, Paradise Valley and The Search for Everything) and earned multiple Grammy Awards as a top guitarist, vocalist and lyricist.

'You're allowed to ironically celebrate your past,' he told the audience before pouring his heart into the song which he wrote when he was 21; seen at his San Diego stop at the Viejas Arena

'You're allowed to ironically celebrate your past,' he told the audience before pouring his heart into the song which he wrote when he was 21; seen at his San Diego stop at the Viejas Arena

Halsey sports chic floral dress with thigh-high slit to John Mayer concert at The Forum in LA

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