The trek - featuring Kimberly, Jessica Sutta, Nicole Scherzinger, Ashley Roberts, and Carmit Bachar - was initially postponed due to the COVID-19 pandemic, but Kimberly says it is set to begin next September (22).
She told The Sun newspaper's Bizarre column, "Nobody has told me that it has been cancelled so I'm holding onto the hope that it's September 2022 until I'm told otherwise."
"I'm desperate to get out there. I had finally felt like I was in the groove, I was ready for it - let's go!"
"The fans deserve it. They have supported us for so long. We need to get out there and do what we do."
The future of the tour was placed in doubt earlier this year when Pussycat Dolls founder Robin Antin filed a lawsuit claiming Nicole was refusing to participate unless she received complete creative control in relaunching the group, as well as a bigger percentage of profits.
However, the singer's lawyer Howard King described the claims as "ludicrous and false" and alleged the lawsuit was "a desperate attempt to divert blame for her own failures by trying to impose obligations on Nicole that simply do not exist."
Slamming Robin's attempts "to trade on Nicole's hard-earned success to pull herself out of a deep financial hole she has created by her own poor business and professional decisions," he cast doubt on the future of the group.
"Nicole loves and respects the PCD fans and hopes to one day be back on stage performing the group's amazing hits for them," added the lawyer.
"Sadly, this will not happen under these circumstances."