Kyle Jacobs seemed upbeat and happy in his last social media post -- giving no hint whatsoever he would take his own life just one day later.
The husband of American Idol alum, Kellie Pickler posted a message to Instagram Thursday celebrating the success of country music star Lee Brice's fifth album, "Hey World." Jacobs produced the album and played guitar on it.
Jacobs wrote, "Platinum?! SWEEEET!!! An amazing crew of incredibly talented peeps put this one together."
He continued, "Deeply honored to be a creative part of it…Thank you Jesus!!!"
TMZ broke the story ... the next day, Jacobs died by suicide after shooting himself inside the home he shared with Pickler in Nashville, Tennessee.
Nashville PD said Pickler got worried when she awoke and couldn't find Jacobs. She and an assistant searched and came upon an upstairs bedroom door, which they couldn't open. After they called 911, police gained entry and discovered Jacobs' body inside.
Jacobs and Pickler tied the knot back in 2011, and together starred in “I Love Kellie Pickler” for 3 seasons; the show launched in 2015. Like Kellie, Kyle was a country music songwriter who had worked with several superstars, including Tim McGraw, Kelly Clarkson and Garth Brooks.