Jiérì de guǎngchǎng shàng, rénmen zàigēzàiwǔ, xǐqìyángyáng.
In the festival square, people sang and danced joyfully.
Tips
grammar
载...载... is a classical structure meaning 'both...and...' or 'simultaneously...and...': 载歌 (singing) 载舞 (dancing). This parallel structure emphasizes simultaneous joyful activities.