57-year-old bride-to-be Katie Couric is celebrating her last week as a single lady!

Closer Weekly has exclusively learned around 45 of the Yahoo News Global Anchor’s nearest and dearest, including Today contributor Jill Rappaport and Katie’s daughters, Carrie and Ellie, feted her at NYC’s Le Midi restaurant in Union Square on June 18.

Katie — who recently told Closer exclusively, “you can never have too many pre-wedding celebrations!” — was the star of the balloon-filled bachelorette party, an eyewitness tells Closer.

Katie’s friends toasted her with speeches in preparation for her intimate wedding to John Molner, set to be held this Saturday, June 21 in East Hampton, N.Y.

After an intimate, wine-filled dinner, which included salad, duck terrine, hangar steak and cake for dessert, the group went downstairs to a private karaoke room, according to an eyewitness.

The onlooker told Closer the women sang songs including “Chapel of Love,” “Will You Love Me Tomorrow?” and “For Once in My Life.”

“Katie was having a ball,” added the onlooker. “She sang nearly every song!” According to the insider, Katie was sipping rosé throughout the evening and even took a tequila shot!

And what bachelorette party wouldn’t be complete without a gift bag for the bride? “Katie left shortly after midnight with a La Perla bag in hand,” said the witness.

As Closer previously reported, John will slip a “a lovely micro-pavé 2-carat diamond wedding band” on her finger when the two exchange vows.

For more on Katie’s fun-filled bachelorette party, pick up the next issue of Closer, on newsstands June 25.