Bruno Mars

Bruno Mars uses Ernie Ball Regular Slinky Guitar Strings (10-46) to keep his Music Man Albert Lee guitar sounding fresh and crisp, as highlighted on Ernie Ball's Instagram.

He is seen playing it live here

In this photo, Bruno Mars is seen with his signature Fender Stratocaster.

the synth on the right in the prologue (check the shape and where the red lights are)

In the official music video for "Die With A Smile," he is visibly playing a Silvertone 1454 hollow-body electric guitar, as documented by the video published on LadyGagaVEVO's YouTube channel.

Bruno Mars uses the Yamaha Montage 8 keyboard, as evidenced by a live performance captured on video during his "Die With A Smile" concert in Jakarta and Las Vegas with Lady Gaga playing on it. In the video, the branding of the keyboard is obscured, but the instrument is identifiable.

Bruno Mars is confirmed to use the Get'm Get'm Dark Leopard Signature Guitar Strap, 2 inches, as evidenced by a photo where he is wearing it. Additionally, a representative from Get'm Get'm has stated that Bruno Mars has been wearing their products for a long time.

Bruno was seen playing this live during a cover of Roxanne.

A Voodoo Lab Pedal Power 2 PLUS is visible on Bruno Mars's live pedalboard, as seen in the image provided.

Bruno is playing through a Fender Showman stack.

In the official behind-the-scenes video titled Bruno Mars - Unorthodox Jukebox: The Making Of The Album, Bruno Mars is shown using the AKG C 414 B-XLS Condenser Mic while recording his album Unorthodox Jukebox, which includes the track "Locked Out of Heaven." This footage is available on Bruno Mars' official YouTube channel.

Bruno Mars is seen using a Fender Custom Shop Mike McCready 1960 Stratocaster in the official music video for his song "I Just Might," as credited by the video's description on YouTube.

In this photo, Bruno Mars is seen using the Get'm Get'm Ariel strap in Ariel White.

In this photo, Bruno Mars can be seen wearing the Get'm Get'm Light Leopard guitar and bass strap.

(The name of the product needs to be edited - it's actually Light Leopard strap, as opposed to the Dark Leopard model)

In this post from Billboard, Bruno Mars is seen playing a Collings City Limits guitar on stage live on the opening night of The Romantic Tour.

In this Instagram post, Bruno Mars is seen playing a Collings I-35 LC on The Romantic World Tour at Allegiant stadium in Las Vegas.