TROUBLE IN PARADISE!

Blake & Gwen caught scrapping on the street

BLAKE SHELTON and fiancée Gwen Stefani exploded in a vicious public screaming match and sources say the ugly spat has friends fearing The Voice lovebirds are near their breaking point!

“The run-up to the wedding has put tremendous strain on both of them — and their relationship,” snitches an insider.

“All the stress boiled over and suddenly they were at each other’s throats!”