MTV News posted an article: "98 Degrees Make Surprise Appearance With New Kids At MixTape Festival"
Donnie shared a few photos of NKOTB and 98 Degrees on stage together:
Here is another video of Joey and Kelly Clarkson's performance from KatieNKOTB
Here are some videos from yikes77:
The intro video, and NKOTB performing "One Song" and "Summertime"
"Dirty Dancing" and "The Right Stuff"
Here is a video of "Cover Girl" from sftbllpunk2010: