The rocker was seen heading into a studio where he spent hours working on new music.
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He was joined by several other artists who arrived 30 minutes after he did.
His assistant was available to ensure the smooth sailing of the musical process.
His return to the studio comes a week after he was rushed to the hospital for inflamed pancreas.
His wife, Kourtney Kardashian, was behind the ambulance that transferred him from one hospital to the other.
Barker’s daughter Alabama asked fans to pray for her dad on her Instagram Story.
Unlike Alabama, her brother, Landon, chose to perform at a concert alongside Machine Gun Kelly.
The duo performed their hit song, “Die in California” to the pleasure of their audience.
Neither party addressed the news of Barker’s hospitalization just hours before.