Talk about one odd fifth wheel factor.
After Wilmer Valderrama and Joe Jonas rang in the New Year together, the two bros partied together again on Saturday night at Beacher's Madhouse in Hollywood.
Also in attendance? Miley Cyrus and boyfriend Liam Hemsworth, who arrived separately from Wilmer and Joe.
So, did Demi Lovato join the party?
Yes. But we'll get to that in a sec.
Miley danced next t...