LOS ANGELES — The buzzer sounded and the party was on at Pauley Pavilion. Then-No. 5 UCLA had just knocked off defending champion and No. 1-ranked South Carolina 77-62, snapping the Gamecocks’ 43-game win streak. The Bruins rushed to the logo at half court, jumping up and down in celebration. Junior star Lauren Betts embraced recent alums Charisma Osborne and Camryn Brown courtside. A group of students rushed onto the court, joining in on the antics.
It was the second dramatic upset in a 24-hour — and 15-mile — span. On Saturday, then-No. 6 Notre Dame upended USC 74-61, leading the…