The music industry's finest stepped out for Sinatra 100: An All-Star Grammy Concert [1] in Las Vegas on Wednesday night. Lady Gaga [2], Tony Bennett, Celine Dion, and Nick Jonas [3] all hit the stage to perform Frank Sinatra's classic songs in honor of what would have been the late crooner's 100th birthday, as did Usher [4] and Alicia Keys [5]. Family Guy creator Seth MacFarlane — a noted Sinatra fan — acted as host for the event, and Frank's daughter Nancy sang with Harry Connick Jr.
Also on hand for the tribute were country artists Carrie Underwood [6], Trisha Yearwood, and Garth Brooks, as well as John Legend [7], who performed a duet with Katharine McPhee before hanging out with his pregnant wife, Chrissy Teigen [8], and fellow singer-model couple Adam Levine and Behati Prinsloo. Keep reading to see the best photos from the event, then be sure to catch the special when it airs on CBS this Sunday, Dec. 6.
Pictured: Lady Gaga [9]
Pictured: Harry Connick Jr.
Pictured: Nick Jonas [10]
Pictured: Garth Brooks
Pictured: John Legend [11] and Chrissy Teigen
Pictured: Quincy Jones and LL Cool J
Pictured: Tony Bennett and Lady Gaga [12]
Pictured: Trisha Yearwood and Garth Brooks
Pictured: Carrie Underwood [13]
Pictured: Lady Gaga [14]
Pictured: Usher [15]
Pictured: Nancy Sinatra and Harry Connick Jr.
Pictured: John Legend [16], Harry Connick Jr., Shelly Brown, and Zac Brown
Pictured: Trisha Yearwood
Pictured: Tony Bennett
Pictured: Usher [17]
Pictured: Tony Bennett and Juanes
Pictured: Lady Gaga [18]
Pictured: Katharine McPhee and John Legend [19]
Pictured: Nick Jonas [20]
Pictured: Lady Gaga [21]
Pictured: Zac Brown and John Legend [22]
Pictured: Lady Gaga [23]
Pictured: Harry Connick Jr.
Pictured: Celine Dion
Pictured: Katharine McPhee and John Legend [24]
Pictured: Carrie Underwood [25]
Pictured: Celine Dion
Pictured: Garth Brooks
Pictured: Katharine McPhee, Behati Prinsloo, Adam Levine, Chrissy Teigen, and John Legend [26]
Pictured: LL Cool J
Pictured: Tony Bennett and Lady Gaga [27]
Pictured: Juanes
Pictured: Lady Gaga [28]
Pictured: Tony Bennett and Lady Gaga [29]
Pictured: Seth MacFarlane
Pictured: Celine Dion
Pictured: Usher [30]
Pictured: John Legend [31]
Pictured: Carrie Underwood [32] and LL Cool J
Pictured: Alicia Keys [33], Chrissy Teigen, and John Legend [34]
Pictured: Lady Gaga [35]
Pictured: Adam Levine
Pictured: Alicia Keys [36]
Pictured: Seth MacFarlane
Pictured: Alicia Keys [37]
Pictured: Adam Levine
Pictured: Garth Brooks
Pictured: Jeremy Renner
Pictured: Katharine McPhee
Pictured: Alicia Keys [38] and Celine Dion