They are if the superstition of catching a bride's bouquet holds up!
The musical couple attended the wedding of Shelton's hairstylist Amanda Craig, co-owner of the Leigh, Edwards & Company salon, in Nashville on Saturday, where Stefani caught the bouquet with an unintentional assist from Shelton.
"Amanda threw the bouquet, and it hit Blake in the head and fell on the floor," says a guest. "Gwen picked it up!"
The Voice judges were among the nearly 350 guests – who also included Carson Daly, country singer and Voice alum RaeLynn and former Voice contestant Gwen Sebastian – attending Craig's wedding to Joel Borski, director of merchandise at Warner Music Nashville.
Shelton, 39, and Stefani, 46, arrived in Nashville ahead of the wedding festivities, and were spotted dining out at O'Charley's restaurant on Friday.
For more on Stefani and Shelton's Nashville weekend, pick up the latest issue of PEOPLE, on newsstands Friday.
The pair hasn't been shy about sharing their affection recently, especially on social media.
"@blakeshelton [you're] so funny and #cute," Stefani tweeted on Jan. 6. She also shared a PDA-filled video of Shelton kissing her while they wore wearing matching camouflage attire on Dec. 21.
Shelton and Stefani began dating in the fall.
Reporting by CYNTHIA SANZ