We smell a new squad in our midst!
However, it appears the epic collaborative performance gave an even cooler gift in the form of new best friends, Blue Ivy Carter and Apple Martin.
For the snap, the Oscar winner wrote:
Some expectant moms play Mozart for their baby bumps. Holly Madison is raising her baby on Rock!
And she only had to pay for one ticket?
Ch-ch-check out the pics (below) to see just how enormous that bump is getting!
Speaking of ages, isn't that kid's birthday coming up soon? LOLz!
[Image via DJDM/WENN.]