選擇晚會背景音樂的開場音樂時，通常要考慮以下幾個因素：節(jié)奏感、歡快的旋律、輕松愉快的氛圍。以下是一些適合作為的推薦：

1. "Celebration" - Kool & The Gang

2. "Happy" - Pharrell Williams

3. "Don't Stop 'Til You Get Enough" - Michael Jackson

4. "Walking on Sunshine" - Katrina and The Waves

5. "I Gotta Feeling" - The Black Eyed Peas

6. "Uptown Funk" - Mark Ronson ft. Bruno Mars

7. "Can't Stop the Feeling!" - Justin Timberlake

8. "Dancing Queen" - ABBA

9. "We Are Family" - Sister Sledge

10. "Good Vibrations" - The Beach Boys

這些歌曲都具有積極向上的節(jié)奏和旋律，適合為晚會熱身并營造歡快的氣氛。請根據(jù)自己的喜好或晚會的主題進(jìn)行選擇。