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ST. PAUL, Minn. (AP) — Stevie Wonder and Chaka Khan had the crowd partying like it was 1999 all over again at a tribute concert to the late mega star Prince.

Khan brought Wonder onstage Thursday night at Xcel Energy Center in St. Paul to duet on Prince’s “I Feel for You,” a 1984 hit for Khan. The duo then performed Prince’s hit “1999,” with the crowd clapping and dancing along.

Friends and former bandmates of Prince celebrated the superstar, who died of an accidental painkiller overdose in April.

Before the show, St. Paul Mayor Chris Coleman read a proclamation on the outdoor plaza declaring Thursday Prince Day in Minnesota’s capital. President Barack Obama also delivered a taped message as the concert opened.

Singers Christina Aguilera and Anita Baker canceled scheduled performances before the event.

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