diff --git a/beets/autotag/distance.py b/beets/autotag/distance.py
index 03c4afe53..7c762de0c 100644
--- a/beets/autotag/distance.py
+++ b/beets/autotag/distance.py
@@ -16,7 +16,7 @@ if TYPE_CHECKING:
     from collections.abc import Iterator, KeysView, Sequence
 
     from beets.library import Item
-    from beets.util import AttrDict
+    from beets.util import Likelies
     from beets.util.color import ColorName
 
     from .hooks import AlbumInfo, TrackInfo
@@ -428,7 +428,7 @@ def track_distance(
 
 
 def distance(
-    original: AttrDict[Any],
+    original: Likelies,
     album_info: AlbumInfo,
     item_info_pairs: list[tuple[Item, TrackInfo]],
     unmatched_count: int,
@@ -436,7 +436,7 @@ def distance(
     """Determine how "significant" an album metadata change would be.
 
     Returns a Distance object.
-    `original` is an AttrDict with the original album metadata.
+    `original` contains original album metadata.
     `album_info` is an AlbumInfo object reflecting the album to be compared.
     `item_info_pairs` is a list with matched (Item, TrackInfo) pairs.
     `unmatched_count` is the number of unmatched tracks on the release.
diff --git a/beets/autotag/source.py b/beets/autotag/source.py
index 4f1b222e2..08cd1c186 100644
--- a/beets/autotag/source.py
+++ b/beets/autotag/source.py
@@ -1,8 +1,8 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, Literal, NamedTuple
+from typing import TYPE_CHECKING, Literal, NamedTuple
 
-from beets.util import AttrDict, get_most_common_tags
+from beets.util import Likelies, get_most_common_tags
 
 if TYPE_CHECKING:
     from collections.abc import Sequence
@@ -14,7 +14,7 @@ class Source(NamedTuple):
     type: Literal["album", "track"]
     artist: str
     name: str
-    data: AttrDict[Any]
+    data: Likelies
     items: Sequence[Item]
     id: str
     id_consensus: bool
@@ -35,11 +35,11 @@ class Source(NamedTuple):
         likelies = get_most_common_tags(items)
         return cls(
             type="album",
-            artist=likelies["artist"],
-            name=likelies["album"],
-            data=AttrDict(likelies),
+            artist=likelies.artist,
+            name=likelies.album,
+            data=likelies,
             items=items,
-            id=likelies["mb_albumid"],
+            id=likelies.mb_albumid,
             id_consensus=len({i.mb_albumid for i in items}) == 1,
         )
 
@@ -50,7 +50,7 @@ class Source(NamedTuple):
             type="track",
             artist=item.artist,
             name=item.title,
-            data=AttrDict(item),
+            data=Likelies(item),
             items=[item],
             id=item.mb_trackid,
             id_consensus=True,
diff --git a/beets/util/__init__.py b/beets/util/__init__.py
index e1f104b28..159fbc3fd 100644
--- a/beets/util/__init__.py
+++ b/beets/util/__init__.py
@@ -811,7 +811,7 @@ def plurality(objs: Iterable[T]) -> tuple[T, int]:
     return c.most_common(1)[0]
 
 
-def get_most_common_tags(items: Sequence[Item]) -> dict[str, Any]:
+def get_most_common_tags(items: Sequence[Item]) -> Likelies:
     """Extract the most common value for each field given a list of items."""
     assert items  # Must be nonempty.
 
@@ -839,7 +839,7 @@ def get_most_common_tags(items: Sequence[Item]) -> dict[str, Any]:
     if len({i.albumartist for i in items}) == 1 and likelies["albumartist"]:
         likelies["artist"] = likelies["albumartist"]
 
-    return likelies
+    return Likelies(likelies)
 
 
 # stdout and stderr as bytes
@@ -1245,3 +1245,21 @@ class AttrDict(dict[str, T]):
 
     def __hash__(self) -> int:  # type: ignore[override]
         return id(self)
+
+
+class Likelies(AttrDict[Any]):
+    """A dictionary of the most common tags in a list of items."""
+
+    artist: str
+    album: str
+    albumartist: str
+    year: int
+    disctotal: int
+    mb_albumid: str
+    label: str
+    barcode: str
+    catalognum: str
+    country: str
+    media: str
+    albumdisambig: str
+    data_source: str