In a weekend congested with star-studded Grammys parties featuring music’s brightest stars, we’ve got great expectorations surrounding one event in particular. Top independent music publisher Primary Wave has a special guest at its 20th anniversary pre-Grammy party: Mr. Mucus! As in, the anthropomorphic green snotty blob who terrorizes nasal cavities in ads for over-the-counter decongestant Mucinex. Mr. Mucus unveils his musical alter ego, Phlegm Boi. Trombone Shorty and CeeLo Green are also slated to perform at the party Saturday.