1:34 PM PT -- Turns out, Sushi was thankfully found by TV chef Sandra Lee, who says the cat wandered into her backyard looking emaciated but very sweet ... so she took him in and nursed him back to health. Then she called the number on the collar ... and made Justin's day so much better.
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Justin Bieber's cat has returned home after an incredible journey, and though the kitty's meow sounds sad ... the family's happy he's home.
JB just revealed his furry pal, Sushi, decided to run away about a month ago. He says he and Hailey began to lose hope of ever getting him back as weeks went by, but they got a call Thursday saying somebody had found him.