Possible Clues:

• "___ gr-r-reat!" (Frosted Flakes slogan)
• Those people are
• "___ playing our song"
• '___ Playing Our Song' (Marvin Hamlisch musical)
• '-- playing our song'
• Frequently misspelled contraction
• Word confused with 'their' and 'there'
• '__ here': 'Poltergeist'
• "___ here!" ("Our guests have arrived!")
• '___ not gonna know what hit 'em'