here are some examples of singers with 7 letters in their name, based on different genres and eras:
- Pop:
- Shakira (Colombian singer)
 - Rihanna (Barbadian singer)
 - Ariana (American singer)
 - Camila (Cuban-American singer)
 - Selena (American singer)
 
 - Rock:
- Alanis (Canadian singer-songwriter)
 - Pattie (American rock singer)
 - Joan (American rock singer)
 - PJ (American rock singer)
 - Stevie (British singer-songwriter)
 
 - Jazz:
- Billie (American jazz singer)
 - Nina (American jazz singer)
 - Sarah (American jazz singer)
 - Carmen (American jazz singer)
 - Ella (American jazz singer)
 
 - Klassiek:
- Cecilia (Swedish mezzo-soprano)
 - Kiri (New Zealand soprano)
 - Jessye (American soprano)
 - Renée (Dutch soprano)
 - Anna (Swedish mezzo-soprano)
 
 
I hope this helps!