All-4-One is an American R&B and pop group formed in 1993. The quartet enjoyed widespread commercial success with their breakthrough hit "I Swear" in the mid-90s, which spent 11 weeks at number one on the Billboard Hot 100 chart. To learn to sing like All-4-One, it is important to focus on their vocal harmony and smooth vocal delivery. Here are some tips and Singing Carrots resources that can help you achieve this:

• Listen and study All-4-One's songs: Listen carefully to All-4-One's songs, paying attention to their harmonies, and vocal style. Try to identify the unique characteristics of their voices and the techniques they use to deliver their songs.
• Practice singing four-part harmony: All-4-One is known for their tight vocal harmony, so practice singing in four-part harmony with other singers to improve your own harmony skills. You can use the Pitch Training tool on Singing Carrots to practice your harmony skills and develop a better understanding of how to sing in harmony.
• Master breath control: All-4-One's smooth vocal delivery is due in part to their mastery of breath control. Singing Carrots offers resources for breathing basics, active and passive breathing, and breath support, which are all crucial elements of good breath control.
• Improve your vocal range: All-4-One's songs often feature dynamic vocal ranges, so working on expanding your vocal range can be helpful in learning to sing like them. You can improve your vocal range with Singing Carrots' range test, pitch accuracy test, and pitch training exercises.
• Articulation and diction: All-4-One is known for being able to convey emotion and deliver a message with their songs. To achieve this, it is important to work on your articulation and diction. Singing Carrots' resources on articulation can be especially helpful in this regard.
• Recommended songs: To practice singing like All-4-One, consider working on their signature songs such as "I Swear", "So Much In Love", and "I Can Love You Like That".

By incorporating these tips and Singing Carrots resources into your singing practice, you can learn to sing like All-4-One and develop your own smooth vocal delivery and harmony skills.