Kim Kardashian postpones daughter's birthday celebrations?

Kardashian, 33 and West, 37, will first attend the Bonnaroo Music and Arts festival and after that will celebrate Father's Day and daughter North West's first birthday.

Reality TV star

and rapper-husband Kanye West have reportedly postponed the birthday celebrations of their daughter, till next weekend.

Kardashian, 33 and West, 37, will first attend the Bonnaroo Music and Arts festival and after that will celebrate Father's Day and daughter

, reported E! Online.

"This weekend, Kanye is performing at Bonaroo and they will fly to New York City for a low-key Father's Day and birthday party," a source said. The party will also have the Kardashian family coming over.

"They are throwing her a big party next weekend and Kourtney (Kardashian), Khloe Kardashian and kids coming home for it," the source said.