BIEBER HITS BOTTOM!

Losing beloved grandpa last straw for jittery Justin

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Justin Bieber wrote "I can't wait to see you again in heaven" on social media after Bruce died at age 80

A SPIRALING Justin Bieber was hit with another devastating emotional gut punch when he lost his beloved grandfather Bruce Dale, who helped raise the pop superstar after his parents split.

Justin's friends fear the loss of Dale, who died April 24 at age 80, will send the 31-year-old into deeper despair at a time when he's already in a depressive funk that's threatening his marriage to Hailey Baldwin, 28, the mother of his 8-month-old baby, Jack Blues.